874 Circulating register test
874 : Circulating register test
- Author: Mike Bell
- Description: Test of a manually placed circulating register suitable for TinyQV's register file
- GitHub repository
- Open in 3D viewer
- Clock: 10 Hz
How it works
The project provides 2 32-bit registers that constantly cycle, in the same way as TinyQV's register file.
There's a 4-bit wide interface to the registers, a write enable for each register, and address selection for two read ports.
How to test
To write a register set its WEN high and clock data in over 8 cycles. To read a register select its address on one of the read ports and observe the data on the appropriate output over 4 cycles.
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | Addr read port A | Data 0 port A | Write enable reg 0 |
| 1 | Data 1 port A | Write enable reg 1 | |
| 2 | Addr read port B | Data 2 port A | |
| 3 | Data 3 port A | ||
| 4 | Data 0 | Data 0 port B | |
| 5 | Data 1 | Data 1 port B | |
| 6 | Data 2 | Data 2 port B | |
| 7 | Data 3 | Data 3 port B |