Texas Instruments AFE79 Series - 2.16.62 Register 251 h (offset = 251 h) [reset = 2 h]; 2.16.63 Register 252 h (offset = 252 h) [reset = 0 h]; 2.16.64 Register 254 h (offset = 254 h) [reset = 1 h]; 2.16.65 Register 255 h (offset = 255 h) [reset = 2 h]

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SBAU337–May 2020
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Serial Interface Register Maps
2.16.62 Register 251h (offset = 251h) [reset = 2h]
Figure 2-2325. Register 251h
7 6 5 4 3 2 1 0
IBUF_ST_GPIO_20
R/W-2h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-2341. Register 251 Field Descriptions
Bit Field Type Reset Description
1-0
IBUF_ST_GPIO_2
0
R/W 2h Input buffer signal strength
2.16.63 Register 252h (offset = 252h) [reset = 0h]
Figure 2-2326. Register 252h
7 6 5 4 3 2 1 0
ODRIV_DS_GPIO_20
R/W-0h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-2342. Register 252 Field Descriptions
Bit Field Type Reset Description
1-0
ODRIV_DS_GPIO_
20
R/W 0h output buffer drive strength.
2.16.64 Register 254h (offset = 254h) [reset = 1h]
Figure 2-2327. Register 254h
7 6 5 4 3 2 1 0
PULL_CTRL_GPIO_21
R/W-1h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-2343. Register 254 Field Descriptions
Bit Field Type Reset Description
2-0
PULL_CTRL_GPIO
_21
R/W 1h
Bit 0 indicates Pull up enable.
Bit <1> Indicates Pull value.
Bit <2> is unused.
2.16.65 Register 255h (offset = 255h) [reset = 2h]
Figure 2-2328. Register 255h
7 6 5 4 3 2 1 0
IBUF_ST_GPIO_21
R/W-2h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset