I/O States
BCM4354 Data Sheet
I/O States
The following notations are used in Table 28: “I/O States,” on page 122:
I: Input signal
O: Output signal
I/O: Input/Output signal
PU = Pulled up
PD = Pulled down
NoPull = Neither pulled up nor pulled down
Note: Where applicable, the default value is shown in bold brackets (for example, [default value].
Table 28: I/O States
b
Power-down
(BT_REG_ON and
Out-of-Reset; Before
SW Download
(BT_REG_ON High;
WL_REG_ON High)
(WL_REG_ON High
and BT_REG_ON Low)
and VDDIOs Are
Present
Low Power State/Sleep (All WL_REG_ON Held
a
Name
I/O Keeper Active Mode
Power Present)
Low)
Power Rail
WL_REG_ON
BT_REG_ON
CLK_REQ
I
N
I: PD
I: PD
I: PD (of 200K)
I: PD (of 200K)
I: PD (of 200K)
–
Pull-down can be disabled
Pull-down can be disabled
I/O
Y
Open drain or push-pull
Programmable
Active high
Open drain or push-pull
Programmable
Active high
High-Z, NoPull
High-Z, NoPull
Open drain
Active high
Open drain
Active high
BT_VDDIO
BT_HOST_WAKE I/O
BT_DEV_WAKE
BT_GPIO 5
Y
Y
I/O: PU, PD, NoPull
Programmable
I/O: PU, PD, NoPull
Programmable
I: PD
I: PD
BT_GPIO 4
I: Floating, but input
disabled
BT_GPIO 2, 3
I: PU
I: PU
I: PU
I: PU
BT_UART_CTS
BT_UART_RTS
BT_UART_RXD
BT_UART_TXD
I
I: NoPull; PU programmable I: NoPull
High-Z, NoPull
O
I
O: NoPull
I: PU
O: NoPull
I: NoPull
O: NoPull
O
O: NoPull
Broadcom®
October 15, 2014 • 4354-DS109-R
Page 122
BROADCOM CONFIDENTIAL
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