I2C Registers
Table 21-33. I2C_SYSTEST Register Field Descriptions (continued)
Bit
Field
Type
Reset
Description
0
SDA_O
R
0h
SDA line drive output value.
In normal functional mode (ST_EN = 0), this bit is don't care.
It reads as 0 and a write is ignored.
In system test mode (ST_EN = 1 and TMODE = 11), a 0 forces a
low level on the SDA line and a 1 puts the I2C output driver to a
high-impedance state.
Value after reset is low.
0x0 = Write 0 to SDA line
0x1 = Write 1 to SDA line
3760
I2C
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated