BCM88335 Data Sheet
Signal Descriptions
Signal Descriptions
The signal name, type, and description of each pin in the BCM88335 is listed in Table 15. The symbols shown
under Type indicate pin directions (I/O = bidirectional, I = input, O = output) and the internal pull-up/pull-down
characteristics (PU = weak internal pull-up resistor and PD = weak internal pull-down resistor), if any.
Table 15: WLBGA Signal Descriptions
WLBGA
Ball#
Signal Name
Description
Type
WLAN and Bluetooth RF Signal Interface
N7
WRF_RFIN_2G
2.4 GHz Bluetooth and WLAN
receiver shared input.
I
N5
BT_RF_TX
Bluetooth PA output.
O
I
N12
N8
WRF_RFIN_5G
WRF_RFOUT_2G
WRF_RFOUT_5G
WRF_TSSI_A
5 GHz WLAN receiver input.
2.4 GHz WLAN PA output.
5 GHz WLAN PA output.
O
O
I
N11
J7
5 GHz TSSI input from an
optional external power
amplifier/power detector.
H7
WRF_RES_EXT/
WRF_GPIO_OUT/
WRF_TSSI_G
GPIO or 2.4 GHz TSSI input
from an optional external power
amplifier/power detector.
I/O
RF Switch Control Lines
F12
F11
E12
E11
D12
F8
RF_SW_CTRL_0
RF_SW_CTRL_1
RF_SW_CTRL_2
RF_SW_CTRL_3
RF_SW_CTRL_4
RF_SW_CTRL_5
RF_SW_CTRL_6
RF_SW_CTRL_7
RF_SW_CTRL_8
RF_SW_CTRL_9
Programmable RF switch
control lines. The control lines
are programmable via the
driver and NVRAM file.
O
O
O
O
O
O
O
O
O
O
H9
G7
E10
F5
WLAN SDIO Bus Interface
Note: These signals can also have alternate functionality depending on host interface mode. See
Table 21: “BCM88335 GPIO/SDIO Alternative Signal Functions,” on page 85 for additional details.
B11
B12
B10
C10
D10
C11
SDIO_CLK
SDIO clock input.
SDIO command line.
SDIO data line 0.
SDIO data line 1.
SDIO data line 2.
SDIO data line 3.
I
SDIO_CMD
I/O
I/O
I/O
I/O
I/O
SDIO_DATA_0
SDIO_DATA_1
SDIO_DATA_2
SDIO_DATA_3
Broadcom®
September 23, 2015 • 88335-DS100-R
Page 75
BROADCOM CONFIDENTIAL
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