I/O States
BCM88335 Data Sheet
Table 22: I/O States (Cont.)
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
Output, NoPull
(All Power Present)
WL_REG_ON Held Low)
Power Rail
RF_SW_CTRL_X
O
N
Output, NoPull
High-Z, NoPull
Output, NoPull
Output, NoPull
VDDIO_RF
a. Keeper column: N = pad has no keeper. Y = pad has a keeper. Keeper is always active except in 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 (SDIO_CLK, for example).
b. In the Power-down state (xx_REG_ON=0): High-Z; NoPull => the pad is disabled because power is not supplied.
c. Depending on whether the PCM interface is enabled and the configuration of PCM is in master or slave mode, it can be either output or input.
d. Depending on whether the I2S interface is enabled and the configuration of I2S is in master or slave mode, it can be either output or input
e. NoPull when in SDIO mode.
Broadcom®
September 23, 2015 • 88335-DS100-R
Page 88
BROADCOM CONFIDENTIAL
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