BCM88335 Data Sheet
Signal Descriptions
Table 15: WLBGA Signal Descriptions (Cont.)
WLBGA
Ball#
Signal Name
Description
Type
Bluetooth UART
E6
BT_UART_CTS_N/
BT_UART_CTS
UARTclear-to-send.Active-low
clear-to-send signal for the HCI
UART interface.
I
F6
BT_UART_RTS_N/
BT_UART_RTS/BT_LED
UART request-to-send. Active-
low request-to-send signal for
the HCI UART interface. BT
LED control pin.
O
G6
F7
BT_UART_RXD/
BT_RFDISABLE2
UART serial input. Serial data
input for the HCI UART
interface. BT RF disable pin 2.
I
BT_UART_TXD
UART serial output. Serial data
output for the HCI UART
interface.
O
Bluetooth/FM I2S
I2S clock, can be master
(output) or slave (input).
J6
BT_I2S_CLK
I/O
I2S data output.
I2S data input.
K6
K5
H6
BT_I2S_DO
BT_I2S_DI
BT_I2S_WS
I/O
I/O
I/O
I2S WS; can be master (output)
or slave (input).
Bluetooth GPIO
M6
BT_AGPIO
BT analog GPIO pin.
I/O
I
Miscellaneous
B3
WL_REG_ON
Used by PMU to power up or
power down the internal
BCM88335 regulators used by
the WLAN section. Also, when
deasserted, this pin holds the
WLAN section in reset. This pin
has an internal 200 kΩ pull-
down resistor that is enabled by
default. It can be disabled
through programming.
D3
BT_REG_ON
Used by PMU to power up or
power down the internal
I
BCM88335 regulators used by
the Bluetooth/FM section. Also,
when deasserted, this pin holds
the Bluetooth/FM section in
reset. This pin has an internal
200 kΩ pull-down resistor that
is enabled by default. It can be
disabled through programming.
Broadcom®
September 23, 2015 • 88335-DS100-R
Page 77
BROADCOM CONFIDENTIAL
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