I/O States
BCM88335 Data Sheet
I/O States
The following notations are used in Table 22:
•
•
•
•
•
•
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 22: I/O States
Out-of-Reset;
b
Power-down
Before SW Download
(BT_REG_ON High;
WL_REG_ON High)
(WL_REG_ON High and
BT_REG_ON = 0) and
VDDIOs Are Present
Low Power State/Sleep (BT_REG_ON and
a
Name
I/O Keeper Active Mode
(All Power Present)
Input; PD (pull-down can Input; PD (pull-down can Input; PD (of 200K)
be disabled) be disabled)
Input; PD (pull down can Input; PD (pull down can Input; PD (of 200K)
be disabled) be disabled)
WL_REG_ON Held Low)
Power Rail
WL_REG_ON
I
N
N
Y
Input; PD (of 200K)
Input; PD (of 200K)
Open drain. Active high
Input; PD (of 200K)
Input; PD (of 200K)
Open drain. Active high.
–
BT_REG_ON
CLK_REQ
I
–
I/O
Open drain or push-pull Open drain or push-pull PD
(programmable). Active (programmable). Active
BT_VDDIO
high.
high
BT_HOST_WAKE I/O
BT_DEV_WAKE I/O
BT_GPIO 2, 3, 4, 5 I/O
Y
Y
Y
Input/Output; PU, PD,
Input/Output; PU, PD,
High-Z, NoPull
High-Z, NoPull
High-Z, NoPull
Input, PU
Input, PD
Input, PD
Input, PD
Input, PD
Input, PD
BT_VDDIO
BT_VDDIO
BT_VDDIO
NoPull (programmable) NoPull (programmable)
Input/Output; PU, PD, Input; PU, PD, NoPull
NoPull (programmable) (programmable)
Input/Output; PU, PD,
Input/Output; PU, PD,
NoPull (programmable) NoPull (programmable)
BT_UART_CTS
BT_UART_RTS
BT_UART_RXD
BT_UART_TXD
SDIO Data
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
BT_VDDIO
BT_VDDIO
BT_VDDIO
BT_VDDIO
VDDIO_SD
O
I
Input; PU
Input; PU
Input; PU
Input; PU
O
I/O
Output; NoPull
Input; PU
Input; PU
Input/Output;
Input; PU (SDIO Mode) High-Z, NoPull
Input; PU (SDIO Mode)
Input; PU (SDIO Mode)
PU (SDIO Mode)
SDIO CMD
SDIO_CLK
I/O
I
N
N
Input/Output;
PU (SDIO Mode)
Input; PU (SDIO Mode) High-Z, NoPull
Input; PU (SDIO Mode)
Input; noPull
Input; PU (SDIO Mode)
Input; noPull
VDDIO_SD
VDDIO_SD
Input; NoPull
Input; noPull
High-Z, NoPull
Broadcom®
September 23, 2015 • 88335-DS100-R
Page 86
BROADCOM CONFIDENTIAL
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