COMPANY ID LIST
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Many SMBus chips have a company ID at location 0x3E or 0xFE.
Here is a partial list.
This may help identify a chip after doing a 'i2cdump [bus] [address]'.
0x01 National Semiconductor
0x12C3 Asus (at 0x4F)
0x1934 Fintek (at 0x5D-0x5E)
0x23 Analog Devices (old products) or Fintek
0x41 Analog Devices (new products)
0x49 TI
0x4D Maxim
0x54 On Semi
0x5C SMSC
0x5D SMSC
0x55 SMSC
0x5CA3 Winbond (at 0x4F)
0x61 Andigilog
0x90 ITE (at 0x58)
0xA1 Philips
0xA3 Winbond (at 0x4F)
0xC3 Asus (at 0x4F)
0xDA Dallas
[A-Z]{3} at 0x00-0x02: Fujitsu-Siemens
Jedec JC 42.4 compliant temperature sensors provide the manufacturer ID
in 16-bit register 0x06. Known manufacturer IDs are as follows.
0x001F Atmel
0x004D Maxim
0x0054 Microchip
0x00B3 IDT
0x104A ST Microelectronics
0x1131 NXP (Philips)
0x11D4 Analog Devices
0x1B09 ON Semiconductor