BCM4319 Preliminary Data Sheet
Signal Descriptions
Table 6: 138-Ball WLBGA Signal Descriptions (Cont.)
Signal Name Type Description
Ball
Miscellaneous Signals
WL6
WL_REG_ON
I
Used by PMU to enable/disable power the internal
regulators.
Vih = 1.6V, maximum = 3.6V, internal pull-down 200 Kohm.
Analog input pin.
WA10
WC11
WE10
XTALIN
I
Crystal oscillator input
Crystal oscillator output
XTALOUT
XTAL_PU
O
O
Request signal to host to provide reference clock.
The BCM4319 asserts this signal when the reference clock
(e.g., TCXO) should be enabled.
StateXTAL_PU
XTAL clock neededHIGH
XTAL clock not needed60 KΩ internal pull-down
Add a external pull-down (100 KΩ) to keep the signal
deasserted when the BCM4319 is powered down.
IO supply = VDDIO
WF10
EXT_POR_L
I
Low asserting global chip reset: digital input pin.
IO supply = VDDIO
Radio and Baseband Power Supplies
WD1
WB1
WE6
WA3
WA5
WC9
WC5
WC8
WE8
WC7
WH4
WG2
WRF_VDDPAG_3P3
WRF_VDDPAA_3P3
WRF_VDDVCO_1P2
WRF_VDDTX_1P2
WRF_VDDRX_1P2
WRF_VDDPFDCP_1P2
WRF_VDDLO_1P2
WRF_VDDD_1P2
I
I
I
I
I
I
I
I
I
I
I
I
3.3V for the internal power amplifiers
3.3V for the internal power amplifiers
1.2V supply for PLL
1.2V supply for radio transmit section
1.2V supply for radio receive section
1.2V supply for PLL
1.2V supply for LO generator
1.2V supply for PLL
WRF_VDDCAB_1P2
WRF_VDDA_1P2
1.2V supply for CAB
1.2V supply for PLL
WRF_BBPLL_VDD_1P2
1.2V supply for baseband PLL
1.2V filtered supply for ADC
WRF_AFE_PAD_AVDD_RXA
DC
WG3
WRF_AFE_PAD_AVDD_AUX
I
1.2V filtered supply for AFE AUX
Broadcom®
Single-Chip IEEE 802.11™ a/b/g/n MAC/Baseband/Radio
Page 52
April 2, 2014 • 4319-DS05-R
CYPRESS [ CYPRESS ]
