4 i2c gp bus i/o expanders, I2c gp bus i/o expanders – Kontron SMARC Evaluation Carrier User Manual
Page 61
User’s Guide
61
15.4 I2C GP Bus I/O Expanders
There are three I/O expanders on the I2C_GP bus, described in the tables below. “Module” notation means that the
pull-up is on the Module (weak pull-up per the SMARC specification)
Device
I2C Address
Output
Function
Pulled
Hi / Low
U44
TI
TCA9554
0x20
(7 bit)
0x40 / 0x41
(8 bit)
P0
GPIO0/CAM0_PWR#
GPIO0 R/W
Module
P1
GPIO1/CAM1_PWR#
GPIO1 R/W
Module
P2
GPIO2/CAM0_RST#
GPIO2 R/W
Module
P3
GPIO3/CAM1_RST#
GPIO3 R/W
Module
P4
GPIO4/HDA_RST#
GPIO4 R/W
Module
P5
GPIO5/PWM_OUT
GPIO5 R/W
Module
P6
GPIO6/TACHIN
GPIO6 R/W
Module
P7
GPIO7/PCAM_FLD
GPIO7 R/W
Module
Device
I2C Address
Output
Function
Pulled
Hi / Low
U43
TI
TCA9554
0x21
(7 bit)
0x42 / 0x43
(8 bit)
P0
GPIO8/CAN0_ERR#
GPIO8 R/W
Module
P1
GPIO9/CAN1_ERR#
GPIO9 R/W
Module
P2
GPIO10
GPIO10 R/W
Module
P3
GPIO11
GPIO11 R/W
Module
P4
LVDS_EVEN_SHDN#
Shutdown Carrier LVDS – even
Low
P5
LVDS_ODD_SHDN#
Shutdown Carrier LVDS – odd
Low
P6
Not used
P7
Not used