Texas Instruments AFE79 Series - 2.16.256 Register 41 Fh (offset = 41 Fh) [reset = 0 h]; 2.16.257 Register 420 h (offset = 420 h) [reset = 1 h]; 2.16.258 Register 423 h (offset = 423 h) [reset = 0 h]

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SBAU337–May 2020
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Serial Interface Register Maps
2.16.256 Register 41Fh (offset = 41Fh) [reset = 0h]
Figure 2-2519. Register 41Fh
7 6 5 4 3 2 1 0
ACTIV_BIR_DIR_CTRL_GPIO_7 reserved
R/W-0h R/W-0h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-2535. Register 41F Field Descriptions
Bit Field Type Reset Description
3-1
ACTIV_BIR_DIR_C
TRL_GPIO_7
R/W 0h
Control to indicate whether the GPIO_7 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
2.16.257 Register 420h (offset = 420h) [reset = 1h]
Figure 2-2520. Register 420h
7 6 5 4 3 2 1 0
reserved reserved BUF_DIR_CTRL_GPIO_8
R/W-0h R/W-0h R/W-1h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-2536. Register 420 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_8
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
2.16.258 Register 423h (offset = 423h) [reset = 0h]
Figure 2-2521. Register 423h
7 6 5 4 3 2 1 0
ACTIV_BIR_DIR_CTRL_GPIO_8 reserved
R/W-0h R/W-0h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset