Products > Test Equipment
AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
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exe:
Well, I desoldered the prom chip, but I don't know how to read it. I have ch341a programmer and Linux. Any hints? All articles I found so far are about reading spi chips, but the one in the dmm is of i2c type (p24c02a). Should it just work, or I need to provide i2c address to the programmer so it can read the eeprom?

PS This is my programmer: https://www.aliexpress.com/item/32793476447.html?spm=a2g0s.9042311.0.0.27424c4dal4nao .
indman:
Dump EPROM RM111 this is analog AN8009 
exe:
Well, I dumped the rom with the command below. I hope it's complete because the tool seems to be hardcoded to dump only 24c32 and 24c64 chips. For some reason the output is 4kb, even though the IC itself is supposed to be 2kb. So, use it at your own risk :(


--- Code: ---$ sudo ch341eeprom -d -s 24c32 -r 8008.rom
Wrote [4096] bytes to file [out.rom]                                                 
Released device interface [0]                                                         
libusb: error [do_close] Device handle closed while transfer was still being processed, but the device is still connected as far as we know
libusb: error [do_close] A cancellation hasn't even been scheduled on the transfer for which the device is closing

--- End code ---
boffin:

--- Quote from: exe on July 16, 2020, 02:06:53 pm ---Well, I dumped the rom with the command below. I hope it's complete because the tool seems to be hardcoded to dump only 24c32 and 24c64 chips. For some reason the output is 4kb, even though the IC itself is supposed to be 2kb. So, use it at your own risk :(


--- Code: ---$ sudo ch341eeprom -d -s 24c32 -r 8008.rom
Wrote [4096] bytes to file [out.rom]                                                 
Released device interface [0]                                                         
libusb: error [do_close] Device handle closed while transfer was still being processed, but the device is still connected as far as we know
libusb: error [do_close] A cancellation hasn't even been scheduled on the transfer for which the device is closing

--- End code ---

a 24c32 is 32 kbits (hence the 32), or 4kbytes


--- End quote ---
andyB2022:
Hi, after modifying with an Arduino "writeByte(I2C_ADDR, 0xAD, (byte) 0x13)", the temperature shown by the meter is 38-40 degrees C even with shorted leads, which is way too high. I've tried a temperature probe from a uni-t and the temperature does rise if I touch it to something hot but it's off with over 15 degrees C. Using the same probe with a "good" meter I get 30C instead of 45C with Aneng.

May it be because I didn't activate Fahrenheit degrees too? (I never use Fahrenheit).

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