975 Temperature Sensor NG :: Quicker, easier and cheaper to make your own chip!

975 : Temperature Sensor NG

Author: Harald Pretl

Description: Temperature sensor synthesized from standard cells

Clock: 10000000 Hz

There will be a better explanation in the future. In short, it measures the on-chip temperature, and puts out the result.

Simply turn it on, and see the result. IO usage documented in the info.yml.

For direct outside control (bypassing the internal measurement state machine), use the following settings:

Set uio_in[3:0] = 0b1111 (enable debug mode 15).
Set the DAC by using ui_in[5:0] (6b direct control of tempsens_dat[5:0]).
ui_in[6] is connected to tempsens_enable.
ui_in[7] is connected to tempsens_prechrgn.
The output of the temperature sensor tempsens_tempdelay is connected to uio_out[4].
Use the clk input to synchronize the temperature output of falling edge.

Requires a logic analyzer or similar to inspect the digital outputs.

#	Input	Output	Bidirectional
0	DAC code [0]	out[0] or out[8] or out[16]	debug sel [0]
1	DAC code [1]	out[1] or out[9] or out[17]	debug sel [1]
2	DAC code [2]	out[2] or out[10] or out[18]	debug sel [2]
3	DAC code [3]	out[3] or out[11] or out[19]	debug sel [3]
4	DAC code [4]	out[4] or out[12]	debug out [0]
5	DAC code [5]	out[5] or out[13]	debug out [1]
6	output selection [0]	out[6] or out[14]	debug out [2]
7	output selection [1]	out[7] or out[15]	debug out [3]

Input

Output

Bidirectional

DAC code [0]

out[0] or out[8] or out[16]

debug sel [0]

DAC code [1]

out[1] or out[9] or out[17]

debug sel [1]

DAC code [2]

out[2] or out[10] or out[18]

debug sel [2]

DAC code [3]

out[3] or out[11] or out[19]

debug sel [3]

DAC code [4]

out[4] or out[12]

debug out [0]

DAC code [5]

out[5] or out[13]

debug out [1]

output selection [0]

out[6] or out[14]

debug out [2]

output selection [1]

out[7] or out[15]

debug out [3]

Chip location