BCM4354 Data Sheet
Signal Descriptions
Table 21: WLCSP Signal Descriptions (Cont.)
Type Description
Bump# Signal Name
Clocks
251
253
159
161
WRF_XTAL_IN
WRF_XTAL_OUT
LPO_IN
I
XTAL oscillator input
XTAL oscillator output
O
I
External sleep clock input (32.768 kHz)
CLK_REQ
O
Reference clock request (shared by BT and WLAN).
If not used, this can be no-connect.
Bluetooth/FM Transceiver
49
–
BT_RF
O
I
Bluetooth PA output
SFLASH_CLK
BT_SF_CLK
BT_SF_CS_L
BT_SF_MISO
BT_SF_MOSI
FM_RFIN
–
I/O SFLASH_CSN
–
I/O SFLASH master input, slave output
I/O SFLASH master output, slave input
–
61
60
54
55
I
FM radio antenna port
FM radio auxiliary antenna port
FM DAC output 1
FM_RFAUX
FM_AOUT1
FM_AOUT2
I
O
O
FM DAC output 2
Bluetooth PCM
179
173
177
163
BT_PCM_CLK
I/O PCM clock; can be master (output) or slave (input)
BT_PCM_IN
I
PCM data input
PCM data output
BT_PCM_OUT
BT_PCM_SYNC
O
I/O PCM sync; can be master (output) or slave (input).
Bluetooth USB Interface
164
BT_USB_DN
I/O USB (Host) data negative. Negative terminal of the
USB transceiver.
169
BT_USB_DP
I/O USB (Host) data positive. Positive terminal of the USB
transceiver.
Bluetooth UART
172
178
162
157
BT_UART_CTS_L
I
UART clear-to-send. Active-low clear-to-send signal
for the HCI UART interface.
BT_UART_RTS_L
BT_UART_RXD
BT_UART_TXD
O
I
UART request-to-send. Active-low request-to-send
signal for the HCI UART interface. BT LED control pin.
UART serial input. Serial data input for the HCI UART
interface.
O
UART serial output. Serial data output for the HCI
UART interface.
Broadcom®
October 15, 2014 • 4354-DS109-R
Page 106
BROADCOM CONFIDENTIAL
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