Texas Instruments AFE79 Series - 2.16.241 Register 400 h (offset = 400 h) [reset = 1 h]; 2.16.242 Register 403 h (offset = 403 h) [reset = 0 h]; 2.16.243 Register 404 h (offset = 404 h) [reset = 1 h]

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Serial Interface Register Maps
Table 2-2519. Register 33E Field Descriptions
Bit Field Type Reset Description
1-0
ODRIV_DS_GPIO_
79
R/W 0h output buffer drive strength.
2.16.241 Register 400h (offset = 400h) [reset = 1h]
Figure 2-2504. Register 400h
7 6 5 4 3 2 1 0
reserved reserved BUF_DIR_CTRL_GPIO_0
R/W-0h R/W-0h R/W-1h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-2520. Register 400 Field Descriptions
Bit Field Type Reset Description
7-5 reserved R/W 0h
4-2 reserved R/W 0h
1-0
BUF_DIR_CTRL_G
PIO_0
R/W 1h
Controls the direction of GPIO
0 both input and output are not selected.. can be used for
analog
1 input mode
2 output mode
3 shouldnt be used
2.16.242 Register 403h (offset = 403h) [reset = 0h]
Figure 2-2505. Register 403h
7 6 5 4 3 2 1 0
ACTIV_BIR_DIR_CTRL_GPIO_0 reserved
R/W-0h R/W-0h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-2521. Register 403 Field Descriptions
Bit Field Type Reset Description
3-1
ACTIV_BIR_DIR_C
TRL_GPIO_0
R/W 0h
Control to indicate whether the GPIO_0 needs dynamic ouptu
t enabling.
0 to 3 --> Static direction
4 --> Use the IO for 3 pin SPI B2 SDIO.
5 --> Use the IO for 4 pin SPI B2 SDO
6 --> Use the IO for 3 pin SPI B1 SDIO.
7 --> use the IO for 4 pin SPI B1 SDO.
0-0 reserved R/W 0h
2.16.243 Register 404h (offset = 404h) [reset = 1h]
Figure 2-2506. Register 404h
7 6 5 4 3 2 1 0
reserved reserved BUF_DIR_CTRL_GPIO_1
R/W-0h R/W-0h R/W-1h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset