BCM4319 Preliminary Data Sheet
Signal Descriptions
Signal Descriptions
138-Ball WLBGA Package
Signal descriptions for the 138-Ball WLBGA are provided in Table 6. *See Table 7: “SDIO Pin Descriptions,” on
page 54 for additional information.
Note: Digital IOs are not failsafe. Other devices should not drive BCM4319 lines when the
corresponding IO supply is absent. If such a requirement exists in the system, add a series resistor
greater than 3.9 KΩ on the line.
Note: Internal pulls on digital IOs are active only when VDDC and the corresponding IO supply are
present.
Note: XTALIN is failsafe.
Table 6: 138-Ball WLBGA Signal Descriptions
Ball
Signal Name
Type Description
RF Interface
WE1
WA6
WA8
WE3
WRF_RFOUTP_G
O
I
802.11g internal power amplifier RF output
WRF_RFINP_G1
802.11g RX RF input (50Ω)
802.11g RX transformer RF ground
WRF_RFINN_G1_XFMR
WRF_AFE_PAD_TSSI_G
O
I
Transmit signal strength indicator for optional external
802.11g power amplifier. Leave NC if not used.
WB2
WA4
WB4
WH3
WRF_RFOUTP_A
O
I
802.11a internal power amplifier RF output.
802.11a RX RF input (50Ω)
802.11a RX transformer RF ground
WRF_RFINP_A1
WRF_RFINN_A1_XFMR
WRF_AFE_PAD_TSSI_A
I
I
Transmit signal strength indicator for optional external
802.11a power amplifier. Leave NC if not used.
WB9
WRF_RES_EXT
O
Connect to external 15 kΩ (1% tolerance) resistor to
ground.
RF Control Lines (IO Supply = VDDIO_RF)
WG8
WG7
WH9
WH8
WJ6
WJ5
WH7
WG5
WG6
WJ1
RF_SW_CTRL_P_0
RF_SW_CTRL_N_0
RF_SW_CTRL_P_2
RF_SW_CTRL_N_2
RF_SW_CTRL_P_3
RF_SW_CTRL_N_3
GMODE_TX_PU
O
O
O
O
O
O
O
O
O
O
Programmable RF switch control lines: default = low.
Programmable RF switch control line: default = high.
Programmable RF switch control line: default = low.
802.11g optional external PA control
GMODE_EXT_LNA_PU
GMODE_EXT_LNA_GAIN
AMODE_TX_PU
Enable signal for optional external 802.11g LNA
Control signal for optional external 802.11g LNA
802.11a optional external PA control
Broadcom®
Single-Chip IEEE 802.11™ a/b/g/n MAC/Baseband/Radio
Page 49
April 2, 2014 • 4319-DS05-R
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