This reference design (RD) describes a 1-Wire® Master with PicoBlaze™ 8-bit embedded microcontroller design implemented and tested on the Xilinx® Spartan®-6 LX9 MicroBoard by Avnet. This example design uses the DS28EA001-Wire digital thermometer with sequence detect and PIO on a peripheral module. This module uses the Pmod™ port standard developed by Digilent Inc.
System Design Block Diagram
The system shown in Figure 1 shows the high-level implementation of the design. The system requires:
- PicoBlaze processor
- 2 BRAMs (each 1024 x 18-bit)
- RS-232 port (USB UART)
- LEDs for alarms
- 681Ω ±1% pullup resistor
- Maxim Integrated DS28EA00 peripheral module (DS28EA00PMB1#)
- Xilinx platform cable USB
Figure 1. System design block diagram
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