DS2155 and DS26502 Software Comparison

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Abstract

This application note discusses the differences between the DS2155 T1/E1/J1 Single Chip Transceiver and the DS26502 T1/E1/J1/64KCC Bits Element register maps.

The DS26502 is a T1/E1/J1/64kHz Composite Clock Bits Element that also functions as a reduced-feature-set SCT. As it was loosely based on the DS2155 SCT, the memory map and register set have many similarities to the DS2155, making it fairly easy to migrate existing DS2155 software drivers to the DS26502. However some changes will be necessary because of added features, removed features and general changes to the memory map and register set.

Introduction

This application note discusses the differences between the DS2155 T1/E1/J1 Single Chip Transceiver and the DS26502 T1/E1/J1/64KCC Bits Element register maps. The DS26502 is a T1/E1/J1/64kHz Composite Clock Bits Element that also functions as a reduced -feature-set SCT. As it was loosely based on the DS2155 SCT, the memory map and register set have many similarities to the DS2155, making it fairly easy to migrate existing DS2155 software drivers to the DS26502. However some changes will be necessary because of added features, removed features, and general changes to the memory map and register set.

Please consult the latest datasheets for detailed register locations and bit descriptions.

Direct Register Mapping

The following registers may be directly mapped from the DS2155 to the DS26502. The bit locations and functionality for each of these registers has not changed.

Table 1. Direct Register Mapping
DS26502 DS2155 DS26502 Register Description
Address Name Address Name
03 T1RCR1 03 T1RCR1 T1 Receive Control Register 1
1F BOCC 37 BOCC BOC Control Register
30 LIC1 78 LIC1 Line Interface Control Register 1
40 TAF D0 TAF Transmit Align Frame Register
41 TNAF D1 TNAF Transmit Nonalign Frame Register
42 TsiAF D2 TsiAF Transmit Si Align Frame
43 TSiNAF D3 TSiNAF Transmit Si Nonalign Frame
44 TRA D4 TRA Transmit Remote Alarm Bits
45 TSa4 D5 TSa4 Transmit Sa4 Bits
46 TSa5 D6 TSa5 Transmit Sa5 Bits
47 TSa6 D7 TSa6 Transmit Sa6 Bits
48 TSa7 D8 TSa7 Transmit Sa7 Bits
49 TSa8 D9 TSa8 Transmit Sa8 Bits
4A TSACR DA TSACR Transmit Sa Bit Control Register
50 RFDL C0 RFDL Receive FDL Register
51 TFDL C1 TFDL Transmit FDL Register
52 RFDLM1 C2 RFDLM1 Receive Facility Data Link Match Register 1
53 RFDLM2 C3 RFDLM2 Receive Facility Data Link Match Register 2
56 RAF C6 RAF Receive Align Frame Register
57 RNAF C7 RNAF Receive Nonalign Frame Register
58 RSiAF C8 RSiAF Receive Si Align Frame
59 RSiNAF C9 RSiNAF Receive Si Nonalign Frame
5A RRA CA RRA Receive Remote Alarm Bits
5B RSa4 CB RSa4 Receive Sa4 Bits
5C RSa5 CC RSa5 Receive Sa5 Bits
5D RSa6 CD RSa6 Receive Sa6 Bits
5E RSa7 CE RSa7 Receive Sa7 Bits
5F RSa8 CF RSa8 Receive Sa8 Bits
F0 TEST1 F0 TEST1 Test Register 1 - For Factory Use Only
F1 TEST2 F1 TEST2 Test Register 2- For Factory Use Only
F2 TEST3 F2 TEST3 Test Register 3 - For Factory Use Only
F3 TEST4 F3 TEST4 Test Register 4 - For Factory Use Only
F4 TEST5 F4 TEST5 Test Register 5 - For Factory Use Only
F5 TEST6 F5 TEST6 Test Register 6 - For Factory Use Only
F6 TEST7 F6 TEST7 Test Register 7 - For Factory Use Only
F7 TEST8 F7 TEST8 Test Register 8 - For Factory Use Only
F8 TEST9 F8 TEST9 Test Register 9 - For Factory Use Only
F9 TEST10 F9 TEST10 Test Register 10 - For Factory Use Only
FA TEST11 FA TEST11 Test Register 11 - For Factory Use Only
FB TEST12 FB TEST12 Test Register 12 - For Factory Use Only
FC TEST13 FC TEST13 Test Register 13 - For Factory Use Only
FD TEST14 FD TEST14 Test Register 14 - For Factory Use Only
FE TEST15 FE TEST15 Test Register 15 - For Factory Use Only
FF TEST16 FF TEST16 Test Register 16 - For Factory Use Only

Modified Registers

The following registers exist in the DS2155 and the DS26502. However, register addresses, bit names, functionality or location may have changed. The following table shows the register contents for each register that had changes. Please refer to the DS26502 datasheet for a complete register and bit description. The most recent DS26502 datasheet can be found at www.analog.com.

Table 2. Modified Registers
Address Bit DS26502 DS2155 DS26502 Register Description
TSTRREG MSTRREG
00 0 SFTRST SFTRST Test Reset Register
1 - T1/E1
2 - TEST0
3 - TEST1
4 TEST0 -
5 TEST1 -
6 - -
7 - -
Address Bit DS26502 DS2155 DS26502 Register Description
IOCR1 IOCR1
01 0 ODF ODF I/O Configuration Register 1
1 TSIO TSIO
2 TSM TSM
3 CSM_TSDW TSDW
4 RLOFF RSIO
5 RSMS1 RSMS1
6 RSMS2 RSMS2
7 G703TE RSMS
Address Bit DS26502 DS2155 DS26502 Register Description
IOCR2 IOCR2
02 0 RPCOE RSCLKM I/O Configuration Register 2
1 TPCOE TSCLKM
2 - H100EN
3 - TSSYNCINV
4 TS_8K_4INV TSYNCINV
5 RS_8KINV RSYNCINV
6 TCLKINV TCLKINV
7 RCLKINV RCLKINV
Address Bit DS26502 DS2155 DS26502 Register Description
T1RCR2 T1RCR2
04 0 RD4YM RD4YM T1 Receive Control Register 2
1 RJC RJC
2 - RZBTSI
3 - RZSE
4 - RSLC96
5 RB8ZS RB8ZS
6 - RFM
7 - -
Address Bit DS26502 DS2155 DS26502 Register Description
T1TCR1 T1TCR1
05 0 TYEL TYEL T1 Transmit Control Register 1
1 - TBL
2 - TFDLS
3 - GB7S
4 - TSSE
5 TCPT TCPT
6 TFPT TFPT
7 TJC TJC
Address Bit DS26502 DS2155 DS26502 Register Description
T1TCR2 T1TCR2
06 0 TB7ZS TB7ZS T1 Transmit Control Register 2
1 - TZBTSI
2 TD4YM TD4YM
3 FBCT1 FBCT1
4 FBCT2 FBCT2
5 - TZSE
6 TFSE TSLC96
7 TB8ZS TB8ZS
Address Bit DS26502 DS2155 DS26502 Register Description
T1CCR T1CCR
07 0 - TLOOP T1 Common Control Register
1 PDE PDE
2 - TFM
3 TAIS-CI TAIS-CI
4 TRAI-CI TRAI-CI
5 - -
6 - -
7 - -
Address Bit DS26502 DS2155 DS26502 Register Description
IDR IDR
10
1F		 0 N N Device Identification Register - The lower four bits will display the die revision.

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 N N
2 N N
3 N N
4 0 0
5 0 0
6 0 1
7 0 1
Address Bit DS26502 DS2155 DS26502 Register Description
INFO1 INFO1
11
10		 0 RL0 FBE Information Register 1

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 RL1 B8ZS
2 RL2 SEFE
3 RL3 16ZD
4 - 8ZD
5 - COFA
6 - TPDV
7 - RPDV
Address Bit DS26502 DS2155 DS26502 Register Description
INFO2 INFO2
12
11		 0 CASRC RL0 Information Register 2

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155. The DS26502 INFO2 register is identical to the DS2155 INFO3 register located at Address 12h.
1 FASRC RL1
2 CRCRC RL2
3 - RL3
4 - TOCD
5 - TCLE
6 - BD
7 - BSYNC
Address Bit DS26502 DS2155 DS26502 Register Description
IIR IIR1
13
14		 0 SR1 SR1 Interrupt Information Register

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 SR2 SR2
2 SR3 SR3
3 SR4 SR4
4 - SR5
5 - SR6
6 - SR7
7 - SR8
Address Bit DS26502 DS2155 DS26502 Register Description
SR1 SR1
14
16		 0 - LOLITC Status Register 1

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 TOCD TOCD
2 TCLE TCLE
3 - LRCL
4 JALT JALT
5 - RSCOS
6 - TIMER
7 - ILUT
Address Bit DS26502 DS2155 DS26502 Register Description
IMR1 IMR1
15
17		 0 - LOLITC Interrupt Mask Register 1

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 TOCD TOCD
2 TCLE TCLE
3 - LRCL
4 JALT JALT
5 - RSCOS
6 - TIMER
7 - ILUT
Address Bit DS26502 DS2155 DS26502 Register Description
SR2 SR2
16
18		 0 RLOF RLOS Status Register 2

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 RLOS FRCL
2 RAIS RUA1
3 RYEL RYEL
4 RLOFC RLOSC
5 RLOSC FRCLC
6 RAISC RUA1C
7 RYELC RYELC
Address Bit DS26502 DS2155 DS26502 Register Description
IMR2 IMR2
17
19		 0 RLOF RLOS Interrupt Mask Register 2

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 RLOS FRCL
2 RAIS RUA1
3 RYEL RYEL
4 RLOFC RLOSC
5 RLOSC FRCLC
6 RAISC RUA1C
7 RYELC RYELC
Address Bit DS26502 DS2155 DS26502 Register Description
SR3 SR3
18
1A		 0 RBOC RRA Status Register 3

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 RMTCH RDMA
2 TFDLE V52LNK
3 RFDLF LORC
4 RFDLAD LOTC
5 BOCC LUP
6 LOTC LDN
7 - LSPARE
Address Bit DS26502 DS2155 DS26502 Register Description
IMR3 IMR3
19
1B		 0 RBOC RRA Interrupt Mask Register 3

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 RMTCH RDMA
2 TFDLE V52LNK
3 RFDLF LORC
4 RFDLAD LOTC
5 BOCC LUP
6 LOTC LDN
7 - LSPARE
Address Bit DS26502 DS2155 DS26502 Register Description
SR4 SR4
1A
1C		 0 RAF RAF Status Register 4

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 RCMF RCMF
2 RMF RMF
3 TAF TAF
4 TMF TMF
5 RSA0 RSAZ
6 RSA1 RSAO
7 RAIS-CI RAIS-CI
Address Bit DS26502 DS2155 DS26502 Register Description
IMR4 IMR4
1B
1D		 0 RAF RAF Interrupt Mask Register 4

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 RCMF RCMF
2 RMF RMF
3 TAF TAF
4 TMF TMF
5 RSA0 RSAZ
6 RSA1 RSAO
7 - RAIS-CI
Address Bit DS26502 DS2155 DS26502 Register Description
INFO3 INFO3
1C
12		 0 CRC4SA CASRC Information Register 3

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 CASSA FASRC
2 FASSA CRCRC
3 CSC0 -
4 CSC2 -
5 CSC3 -
6 CSC4 -
7 CSC5 -
Address Bit DS26502 DS2155 DS26502 Register Description
E1RCR E1RCR1
1D
33		 0 RESYNC RESYNC E1 Receive Control Register

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 SYNCE SYNCE
2 FRC FRC
3 - RCRC4
4 - RG802
5 RHDB3 RHDB3
6 RLOSA RSIGM
7 - RSERC
Address Bit DS26502 DS2155 DS26502 Register Description
E1TCR E1TCR1
1E
35		 0 AAIS TCRC4 E1 Transmit Control Register

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 THDB3 TG802
2 - THDB3
3 AEBE TSA1
4 TSiS TSiS
5 ARA TUA1
6 - T16S
7 TFPT TFPT
Address Bit DS26502 DS2155 DS26502 Register Description
LBCR LBCR
20
4A		 0 - FLB Loopback Control Register

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 - PLB
2 RLB RLB
3 LLB LLB
4 - LIUC
5 - -
6 - -
7 - -
Address Bit DS26502 DS2155 DS26502 Register Description
SR5 SR5
21
1E		 0 SA4INT RSLIP Status Register 5.

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 SA5INT RESEM
2 SA6INT RESF
3 SA7INT TSLIP
4 SA8INT TESEM
5 - TESF
6 - -
7 - -
Address Bit DS26502 DS2155 DS26502 Register Description
IMR5 IMR5
22
1F		 0 SA4INT RSLIP Interrupt Mask Register 5.

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 SA5INT RESEM
2 SA6INT RESF
3 SA7INT TSLIP
4 SA8INT TESEM
5 - TESF
6 - -
7 - -
Address Bit DS26502 DS2155 DS26502 Register Description
LIC2 LIC2
31
79		 0 CLDS CLDS Line Interface Control Register 2

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 SCLD SCLD
2 RCCFE -
3 JACKS0 JAMUX
4 TAIS TUA1
5 IBPV IBPV
6 LIRST LIRST
7 JACKS1 ETS
Address Bit DS26502 DS2155 DS26502 Register Description
LIC3 LIC3
32
7A		 0 TAOZ TAOZ Line Interface Control Register 3

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 - TSCLKE
2 - RSCLKE
3 MM0 MM0
4 MM1 MM1
5 - RCES
6 CMII TCES
7 CMIE -
Address Bit DS26502 DS2155 DS26502 Register Description
LIC4 LIC4
33
7B		 0 RT0 RT0 Line Interface Control Register 4

Note: The first address shown is the register location in the DS26502. The second is the register location from the DS2155.
1 RT1 RT1
2 RT2 TT0
3 TT0 TT1
4 TT1 MPS0
5 TT2 MPS1
6 MPS0 CMII
7 MPS1 CMIE

New DS26502 Registers

The following registers are new in the DS26502. Please consult the DS26502 datasheet for detailed register information. The most recent datasheet can be found at www.analog.com

Table 3. New DS26502 Registers
Address Name DS26502 Register Description
08 MCREG Mode Configuration Register
09 TPCR Transmit PLL Control Register
34 TLBC Transmit Line Build-Out Control

Removed DS2155 Registers

The following registers existed in the DS2155 but are no longer present in the DS26502. These functions are not available on the DS26502, or the contents of these registers have been moved to another register in the memory map. Please consult the DS2155 datasheet for detailed register information. The most recent datasheet can be found at www.analog.com

Table 4. Removed DS2155 Registers
Address Name DS2155 Register Description
08 SSIE1 Software Signaling Insertion Enable 1
09 SSIE2 Software Signaling Insertion Enable 2
0A SSIE3 Software Signaling Insertion Enable 3
0B SSIE4 Software Signaling Insertion Enable 4
0C T1RDMR1 T1 Receive Digital Milliwatt Enable Register 1
0D T1RDMR2 T1 Receive Digital Milliwatt Enable Register 2
0E T1RDMR3 T1 Receive Digital Milliwatt Enable Register 3
15 IIR2 Interrupt Information Register 2
1E SR5 Status Register 5
1F IMR5 Interrupt Mask Register 5
20 SR6 Status Register 6
21 IMR6 Interrupt Mask Register 6
22 SR7 Status Register 7
23 IMR7 Interrupt Mask Register 7
24 SR8 Status Register 8
25 IMR8 Interrupt Mask Register 8
26 SR9 Status Register 9
27 IMR9 Interrupt Mask Register 9
28 PCPR Per-Channel Pointer Register
29 PCDR1 Per-Channel Data Register 1
2A PCDR2 Per-Channel Data Register 2
2B PCDR3 Per-Channel Data Register 3
2C PCDR4 Per-Channel Data Register 4
2D INFO4 Information Register 4
2E INFO5 Information Register 5
2F INFO6 Information Register 6
30 INFO7 Information Register 7
31 H1RC HDLC #1 Receive Control
32 H2RC HDLC #2 Receive Control
41 ERCNT Error Count Configuration Register
42 LCVCR1 Line Code Violation Count Register 1
43 LCVCR2 Line Code Violation Count Register 2
44 PCVCR1 Path Code Violation Count Register 1
45 PCVCR2 Path Code Violation Count Register 2
46 FOSCR1 Frames Out-of-Sync Count Register 1
47 FOSCR2 Frames Out-of-Sync Count Register 2
48 EBCR1 E-Bit Count Register 1
49 EBCR2 E-Bit Count Register 2
4B PCLR1 Per-Channel Loopback Enable Register 1
4C PCLR2 Per-Channel Loopback Enable Register 2
4D PCLR3 Per-Channel Loopback Enable Register 3
4E PCLR4 Per-Channel Loopback Enable Register 4
4F ESCR Elastic Store Control Register
50 TS1 Transmit Signaling Register 1
51 TS2 Transmit Signaling Register 2
52 TS3 Transmit Signaling Register 3
53 TS4 Transmit Signaling Register 4
54 TS5 Transmit Signaling Register 5
55 TS6 Transmit Signaling Register 6
56 TS7 Transmit Signaling Register 7
57 TS8 Transmit Signaling Register 8
58 TS9 Transmit Signaling Register 9
59 TS10 Transmit Signaling Register 10
5A TS11 Transmit Signaling Register 11
5B TS12 Transmit Signaling Register 12
5C TS13 Transmit Signaling Register 13
5D TS14 Transmit Signaling Register 14
5E TS15 Transmit Signaling Register 15
5F TS16 Transmit Signaling Register 16
60 RS1 Receive Signaling Register 1
61 RS2 Receive Signaling Register 2
62 RS3 Receive Signaling Register 3
63 RS4 Receive Signaling Register 4
64 RS5 Receive Signaling Register 5
65 RS6 Receive Signaling Register 6
66 RS7 Receive Signaling Register 7
67 RS8 Receive Signaling Register 8
68 RS9 Receive Signaling Register 9
69 RS10 Receive Signaling Register 10
6A RS11 Receive Signaling Register 11
6B RS12 Receive Signaling Register 12
6C RS13 Receive Signaling Register 13
6D RS14 Receive Signaling Register 14
6E RS15 Receive Signaling Register 15
6F RS16 Receive Signaling Register 16
70 CCR1 Common Control Register 1
71 CCR2 Common Control Register 2
72 CCR3 Common Control Register 3
73 CCR4 Common Control Register 4
74 TDS0SEL Transmit Channel Monitor Select
75 TDS0M Transmit DS0 Monitor Register
76 RDS0SEL Receive Channel Monitor Select
77 RDS0M Receive DS0 Monitor Register
7E IAAR Idle Array Address Register
7F PCICR Per-Channel Idle Code Value Register
80 TCICE1 Transmit Idle Code Enable Register 1
81 TCICE2 Transmit Idle Code Enable Register 2
82 TCICE3 Transmit Idle Code Enable Register 3
83 TCICE4 Transmit Idle Code Enable Register 4
84 RCICE1 Receive Idle Code Enable Register 1
85 RCICE2 Receive Idle Code Enable Register 2
86 RCICE3 Receive Idle Code Enable Register 3
87 RCICE4 Receive Idle Code Enable Register 4
88 RCBR1 Receive Channel Blocking Register 1
89 RCBR2 Receive Channel Blocking Register 2
8A RCBR3 Receive Channel Blocking Register 3
8B RCBR4 Receive Channel Blocking Register 4
8C TCBR1 Transmit Channel Blocking Register 1
8D TCBR2 Transmit Channel Blocking Register 2
8E TCBR3 Transmit Channel Blocking Register 3
8F TCBR4 Transmit Channel Blocking Register 4
90 H1TC HDLC #1 Transmit Control
91 H1FC HDLC #1 FIFO Control
92 H1RCS1 HDLC #1 Receive Channel Select 1
93 H1RCS2 HDLC #1 Receive Channel Select 2
94 H1RCS3 HDLC #1 Receive Channel Select 3
95 H1RCS4 HDLC #1 Receive Channel Select 4
96 H1RTSBS HDLC #1 Receive Time Slot Bits/Sa Bits Select
97 H1TCS1 HDLC #1 Transmit Channel Select1
98 H1TCS2 HDLC #1 Transmit Channel Select2
99 H1TCS3 HDLC #1 Transmit Channel Select3
9A H1TCS4 HDLC #1 Transmit Channel Select4
9B H1TTSBS HDLC #1 Transmit Time Slot Bits/Sa Bits Select
9C H1RPBA HDLC #1 Receive Packet Bytes Available
9D H1TF HDLC #1 Transmit FIFO
9E H1RF HDLC #1 Receive FIFO
9F H1TFBA HDLC #1 Transmit FIFO Buffer Available
A0 H2TC HDLC #2 Transmit Control
A1 H2FC HDLC #2 FIFO Control
A2 H2RCS1 HDLC #2 Receive Channel Select 1
A3 H2RCS2 HDLC #2 Receive Channel Select 2
A4 H2RCS3 HDLC #2 Receive Channel Select 3
A5 H2RCS4 HDLC #2 Receive Channel Select 4
A6 H2RTSBS HDLC #2 Receive Time Slot Bits/Sa Bits Select
A7 H2TCS1 HDLC #2 Transmit Channel Select1
A8 H2TCS2 HDLC #2 Transmit Channel Select2
A9 H2TCS3 HDLC #2 Transmit Channel Select3
AA H2TCS4 HDLC #2 Transmit Channel Select4
AB H2TTSBS HDLC #2 Transmit Time Slot Bits/Sa Bits Select
AC H2RPBA HDLC #2 Receive Packet Bytes Available
AD H2TF HDLC #2 Transmit FIFO
AE H2RF HDLC #2 Receive FIFO
AF H2TFBA HDLC #2 Transmit FIFO Buffer Available
B0 ESIBCR1 Extend System Information Bus Control Register 1
B1 ESIBCR2 Extend System Information Bus Control Register 2
B2 ESIB1 Extend System Information Bus Register 1
B3 ESIB2 Extend System Information Bus Register 2
B4 ESIB3 Extend System Information Bus Register 3
B5 ESIB4 Extend System Information Bus Register 4
B6 IBCC In-Band Code Control Register
B7 TCD1 Transmit Code Definition Register 1
B8 TCD2 Transmit Code Definition Register 2
B9 RUPCD1 Receive Up Code Definition Register 1
BA RUPCD2 Receive Up Code Definition Register 2
BB RDNCD1 Receive Down Code Definition Register 1
BC RDNCD2 Receive Down Code Definition Register 2
BD RSCC In-Band Receive Spare Control Register
BE RSCD1 Receive Spare Code Definition Register 1
BF RSCD2 Receive Spare Code Definition Register 2
C5 IBOC Interleave Bus Operation Control Register
DB BAWC BERT Alternating Word Count Rate
DC BRP1 BERT Repetitive Pattern Set Register 1
DD BRP2 BERT Repetitive Pattern Set Register 2
DE BRP3 BERT Repetitive Pattern Set Register 3
DF BRP4 BERT Repetitive Pattern Set Register 4
E0 BC1 BERT Control Register 1
E1 BC2 BERT Control Register 2
E3 BBC1 BERT Bit Count Register 1
E4 BBC2 BERT Bit Count Register 2
E5 BBC3 BERT Bit Count Register 3
E6 BBC4 BERT Bit Count Register 4
E7 BEC1 BERT Error Count Register 1
E8 BEC2 BERT Error Count Register 2
E9 BEC3 BERT Error Count Register 3
EA BIC BERT Interface Control Register
EB ERC Error Rate Control Register
EC NOE1 Number-of-Errors 1
ED NOE2 Number-of-Errors 2
EE NOEL1 Number-of-Errors Left 1
EF NOEL2 Number-of-Errors Left 2

Conclusion

For further questions concerning migrating software from the DS2155 to the DS26502, please contact the Analog Tech support team.

Data sheets for the DS2155 and the DS26502 are available online at www.analog.com.