Video Test Generator User Guide

Video Test Generator User Guide 381
I2CW
I2C port Write
Class EDID and DDC control
Description Writes raw binary data from the DDC port (if equipped), EDID, and VESA DDC/CI
(DDC2Bi) data using the I
2
C bus.
Note: EDID-compatible receivers use EPROMs with single-byte or double-byte
addresses. The I2CW command uses different parameters depending on the EPROM type.
Command syntax
(EPROM with
single-byte
addresses)
I2CW eprom i2c_address offset #_of_bytes data
Command syntax
(EPROM with
double-byte
addresses)
I2CW eprom1 i2c_address offset #_of_bytes data
Command syntax
(DDC/CI protocol)
I2CW ddcci dst_address src_address length [command+data+checksum]
i2c_address (hex)
i
2
c bus address (A0, A1,...)
offset (hex)
address offset (in bytes)
#_of_bytes (hex)
number of bytes
data (hex)
data
command (hex)
command
checksum (hex)
checksum