NAME
seeprom —
24-series I2C EEPROM
driver
SYNOPSIS
seeprom0 at iic0 addr 0x51: AT24Cxx or compatible EEPROM: size
256
seeprom16 at iic1 addr 0x57: power-supply: size 8192
DESCRIPTION
The
seeprom driver provides support for the ATMEL 24-series of
I2C EEPROMs, and compatibles, available from a variety of vendors. The Philips
PCF8582 is also supported, as compatible with the AT24C02.
Access to the contents of the memory is through a character device.
The size of the EEPROM is either read from the firmware, or can be set using the
flags keyword in the kernel configuration. The value of the flag represents
the EEPROM size in Kbit.
flags |
EEPROM size in bytes |
1 |
128 |
2 |
256 |
4 |
512 |
8 |
1024 |
16 |
2048 |
32 |
4096 |
64 |
8192 |
128 |
16384 |
256 |
32768 |
512 |
65536 |
EXAMPLES
Indirect configuration:
seeprom* at iic? addr 0x51 flags
0x2
Direct configuration:
seeprom* at iic? addr?
SEE ALSO
iic(4)
HISTORY
The
seeprom device appeared in
NetBSD
2.0.
BUGS
AT24C1024 EEPROM's are not supported.
Software write protection on the AT34Cxx EEPROMs is not supported.
The
seeprom driver reads and writes one byte at a time to be
compatible with all controllers.