BCM43903 Datasheet, PDF (57/87 Pages) Cypress Semiconductor – WICED™ IEEE 802.11 b/g/n SoC with an Embedded Applications Processor

BCM43903 Preliminary Data Sheet
I/O States
Table 11: I/O States
Ball Name
I/O Keeper^a Active Mode
Low Power State/Sleep Power-down^b
(All Power Present) (REG_ON Held Low)
Out-of-Reset; Before
Software Download
(REG_ON High)
Power Rail
GPIO_15
I/O Y
GPIO_16
I/O Y
RF_SW_CTRL
(0 to 9)
I/O Y
Input/Output; PU, PD, or Input/Output; PU, PD, or High-Z, NoPull
NoPull (programmable NoPull (programmable
[Default: NoPull])
[Default: NoPull])
Input/Output; PU, PD, or Input/Output; PU, PD, or High-Z, NoPull
NoPull (programmable NoPull (programmable
[Default: NoPull])
[Default: NoPull])
Output; NoPull
Output; NoPull
High-Z
Input; NoPull
Input; NoPull
Output; NoPull
VDDIO
VDDIO
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 (WL_REG_ON, for example).
b. In the power-down state (xx_REG_ON=0): High-Z; NoPull => the pad is disabled because power is not supplied.
Broadcom^®
March 12, 2016 • 43903-DS102-R
BROADCOM CONFIDENTIAL
Page 56