Document Number: 002-14826 Rev. *G
Page 35 of 65
PRELIMINARY
CYW43903
10.4 Alternate GPIO Signal Functions
provides the alternate signal functions of the GPIO signals.
Table 10. Alternate GPIO Signal Functions
GPIO
Default
JTAG_SEL
Default Pull
HOLD/PDLOW/
PDHIGH
Strap
Comments
GPIO_0
–
–
No pull
HOLD
–
8 mA
GPIO_1
–
–
Down
HOLD
GSPI_MODE
8 mA
GPIO_2
GCI_GPIO(0)
JTAG_TCK
No pull
HOLD
–
8 mA
GPIO_3
GCI_GPIO(1)
JTAG_TMS
No pull
HOLD
–
8 mA
GPIO_4
GCI_GPIO(2)
JTAG_TDI
No pull
HOLD
–
8 mA
GPIO_5
GCI_GPIO(3)
JTAG_TDO
No pull
HOLD
–
8 mA
GPIO_6
GCI_GPIO(4)
JTAG_TRST
No pull
HOLD
–
8 mA
GPIO_7
–
–
Down
HOLD
WCPU_BOOT_MODE
8 mA
GPIO_8
GPIO_8
–
No pull
HOLD
–
8 mA
GPIO_9
GPIO_9
–
Down
HOLD
8 mA
GPIO_10
GPIO_10
–
No pull
HOLD
–
8 mA
GPIO_11
–
–
Down
HOLD
ACPU_BOOT_MODE
8 mA
GPIO_12
GPIO_12
–
No pull
HOLD
–
8 mA
GPIO_13
–
–
Down
HOLD
SDIO_MODE
8 mA
GPIO_14
GPIO_14
–
No pull
HOLD
–
8 mA
GPIO_15
–
–
Down
HOLD
VTRIM_EN
8 mA
GPIO_16
–
–
No pull
HOLD
–
8 mA