PRELIMINARY
CYW43438
14.7 I/O States
The following notations are used in Table 20:
■
■
■
■
■
■
I: Input signal
O: Output signal
I/O: Input/Output signal
PU = Pulled up
PD = Pulled down
NoPull = Neither pulled up nor pulled down
Table 20. I/O States1
(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
WL_REG_ON
I
N
N
Y
Input; PD (pull-down
can be disabled)
Input; PD (pull-down can Input; PD (of 200K)
be disabled)
Input; PD (200k)
Input; PD
(200k)
–
–
BT_REG_ON
CLK_REQ
I
Input; PD (pull down
can be disabled)
Input; PD (pull down can Input; PD (of 200K)
be disabled)
Input; PD (200k)
Input; PD
(200k)
Input; PD (200k)
–
I/O
Open drain or push-pull Open drain or push-pull PD
(programmable). Active (programmable). Active
Open drain, active
high.
Open drain,
active high.
Open drain,
active high.
WCC_VDDIO
high.
high
BT_HOST_
WAKE
I/O
Y
Y
I/O; PU, PD, NoPull
(programmable)
I/O; PU, PD, NoPull
(programmable)
High-Z, NoPull
High-Z, NoPull
–
–
Input, PD
Input, PD
Output, Drive low
Input, PD
WCC_VDDIO
WCC_VDDIO
BT_DEV_WAKE I/O
I/O; PU, PD, NoPull
(programmable)
Input; PU, PD, NoPull
(programmable)
BT_UART_CTS
BT_UART_RTS
BT_UART_RXD
BT_UART_TXD
SDIO_DATA_0
I
O
I
Y
Y
Y
Y
N
Input; NoPull
Output; NoPull
Input; PU
Input; NoPull
Output; NoPull
Input; NoPull
Output; NoPull
High-Z, NoPull
High-Z, NoPull
High-Z, NoPull
High-Z, NoPull
–
Input; PU
Input; PU
Input; PU
Input; PU
Input, NoPull
Output, NoPull
Input, NoPull
Output, NoPull
WCC_VDDIO
WCC_VDDIO
WCC_VDDIO
WCC_VDDIO
WCC_VDDIO
–
–
O
I/O
Output; NoPull
–
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
SDIO_DATA_1
SDIO_DATA_2
I/O
I/O
N
N
SDIO MODE ->
NoPull
SDIO MODE -> PU
SDIO MODE -> PU
SDIO MODE -> Input; PU
NoPull
WCC_VDDIO
WCC_VDDIO
SDIO MODE ->
NoPull
SDIO MODE -> Input; PU
NoPull
Document No. Document Number: 002-14796 Rev. *K
Page 63 of 108
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