Author Topic: What are these pins in mutimeter victor vc97?  (Read 1121 times)

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Offline electroniumTopic starter

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What are these pins in mutimeter victor vc97?
« on: December 20, 2023, 06:21:56 am »
What are these pins and what is the purpose of resetting the device in these pins?
 

Online MathWizard

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Re: What are these pins in mutimeter victor vc97?
« Reply #1 on: December 22, 2023, 01:44:20 pm »
There's the upper and lower supplies Vdd and Vss, then microncontroller port numbers, and the the reset or whatever. IDK for sure about the MCU on the DMM, but that should be for uploading the firmware to it, or calibrating it, or some other tweak or readout for testing and programming it.

The group below looks like a serial data interface, SPI or I2C or other like those. I don't know them well enough yet. It may also goto the MCU, or maybe to a ROM chip. Looks like a write protect pin, so probably the ROM chip.


I think some of these are capable of logging to a PC, they have some logic output pin on the MCU, just for it. And a common way to get the data to PC, was to use an infrared LED and some little circuit for the PC. I think it used one of the usual serial data protocols
« Last Edit: December 22, 2023, 01:51:49 pm by MathWizard »
 

Offline tooki

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Re: What are these pins in mutimeter victor vc97?
« Reply #2 on: December 23, 2023, 01:40:48 pm »
There's the upper and lower supplies Vdd and Vss, then microncontroller port numbers, and the the reset or whatever. IDK for sure about the MCU on the DMM, but that should be for uploading the firmware to it, or calibrating it, or some other tweak or readout for testing and programming it.

The group below looks like a serial data interface, SPI or I2C or other like those. I don't know them well enough yet. It may also goto the MCU, or maybe to a ROM chip. Looks like a write protect pin, so probably the ROM chip.
SCL/SDA are I2C. (SPI is MISO/MOSI/CS.)
 


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