BCM88335 Data Sheet
Signal Descriptions
Table 15: WLBGA Signal Descriptions (Cont.)
WLBGA
Ball#
Signal Name
Description
Type
WLAN GPIO Interface
Note: The GPIO signals can be multiplexed via software and the JTAG_SEL pin to behave as various specific
functions. See Table 21: “BCM88335 GPIO/SDIO Alternative Signal Functions,” on page 85 for additional
details.
B6
C6
D6
B5
C5
D5
C4
D4
H1
GPIO_0
GPIO_1
GPIO_2
GPIO_3
GPIO_4
GPIO_5
GPIO_6
GPIO_7
GPIO_8
Programmable GPIO pins.
Note: These GPIO signals can
be configured by software: as
either inputs or outputs, to have
internal pull-ups or pull-downs
enabled or disabled, and to use
either a high or low polarity
upon assertion.
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
JTAG Interface
E5
JTAG_SEL
JTAG select. Pull high to select I/O
the JTAG interface. If the JTAG
interface is not used, this pin
may be left floating or
connected to ground.
Note: See
Table 21: “BCM88335 GPIO/
SDIO Alternative Signal
Functions,” on page 85 for
additional details.
Clocks
H12
J12
B4
WRF_XTAL_IN
WRF_XTAL_OUT
LPO_IN
XTAL oscillator input.
XTAL oscillator output.
I
O
I
External sleep clock input
(32.768 kHz).
H3
CLK_REQ
Reference clock request
(shared by BT and WLAN).
O
Bluetooth PCM
G2
BT_PCM_CLK/BT_PCMCLK PCM clock; can be master
(output) or slave (input).
I/O
G1
J3
BT_PCM_IN
PCM data input.
PCM data output.
I
BT_PCM_OUT
BT_PCM_SYNC
O
H2
PCM sync; can be master
(output) or slave (input).
I/O
Broadcom®
September 23, 2015 • 88335-DS100-R
Page 76
BROADCOM CONFIDENTIAL
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