PRELIMINARY
CYW43438
Table 20. I/O States1 (Cont.)
(WL_REG_ON
= 1
BT_REG_ON = (WL_REG_ON = 0
0) VDDIOs
Present
Out-of-Reset;
Out-of-Reset;
Power-Down3
Low Power State/Sleep WL_REG_ON = 0
(WL_REG_ON = 1;
BT_REG_ON =
Do Not Care)
Keeper
BT_REG_ON = 1)
VDDIOs Present
2
Name
I/O
Active Mode
(All Power Present)
BT_REG_ON = 0
Power Rail
SDIO_DATA_3
I/O
N
N
N
SDIO MODE -> NoPull SDIO MODE -> NoPull
SDIO MODE -> NoPull SDIO MODE -> NoPull
SDIO MODE -> NoPull SDIO MODE -> NoPull
SDIO MODE ->
NoPull
SDIO MODE -> PU
SDIO MODE -> Input; PU
NoPull
WCC_VDDIO
SDIO_CMD
SDIO_CLK
I/O
I
SDIO MODE ->
NoPull
SDIO MODE -> PU
SDIO MODE -> Input; PU
NoPull
WCC_VDDIO
WCC_VDDIO
SDIO MODE ->
NoPull
SDIO MODE ->
NoPull
SDIO MODE -> Input
NoPull
Input; NoPull4
Input; NoPull4
Input; NoPull4
Input; NoPull4
Input; NoPull4
Input; NoPull4
BT_PCM_CLK
BT_PCM_IN
I/O
I/O
I/O
Y
Y
Y
Y
High-Z, NoPull
High-Z, NoPull
High-Z, NoPull
High-Z, NoPull
High-Z, NoPull
High-Z, NoPull5
–
Input, PD
Input, PD
Input, PD
Input, PD
PD
Input, PD
Input, PD
Input, PD
Input, PD
WCC_VDDIO
WCC_VDDIO
WCC_VDDIO
WCC_VDDIO
–
BT_PCM_OUT
–
Input; NoPull4
Input; NoPull4
PD
BT_PCM_SYNC I/O
–
JTAG_SEL
GPIO_0
I
Y
Y
PD
Input, PD
Input, PD
WCC_VDDIO
WCC_VDDIO
I/O
TBD
Active mode
Input, SDIO OOB Int, Active mode
NoPull
Input, NoPull
High-Z, NoPull5
High-Z, NoPull5
GPIO_1
GPIO_2
I/O
I/O
Y
Y
TBD
TBD
Active mode
Active mode
Input, PD
Active mode
Active mode
Input, Strap, PD
WCC_VDDIO
Input, GCI GPIO[7],
NoPull
Input, Strap, NoPull WCC_VDDIO
1. PU = pulled up, PD = pulled down.
2. N = pad has no keeper. Y = pad has a keeper. Keeper is always active except in the power-down state. If there is no keeper, and it is an input and there is NoPull, then the pad should
be driven to prevent leakage due to floating pad, for example, SDIO_CLK.
3. In the Power-down state (xx_REG_ON = 0): High-Z; NoPull => The pad is disabled because power is not supplied.
4. Depending on whether the PCM interface is enabled and the configuration is master or slave mode, it can be either an output or input.
5. The GPIO pull states for the active and low-power states are hardware defaults. They can all be subsequently programmed as a pull-up or pull-down.
Document No. Document Number: 002-14796 Rev. *K
Page 64 of 108
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