CYW4343X
14.8 Signal Descriptions
Table 22 provides the WLBGA package signal descriptions.
Table 22. WLBGA Signal Descriptions
Signal Name
WLBGA Ball Type
Description
RF Signal Interface
O
WLRF_2G_RF
K1
2.4 GHz BT and WLAN RF output port
SDIO Bus Interface
SDIO_CLK
M7
L6
K6
H7
L7
I
SDIO clock input
SDIO command line
SDIO data line 0
SDIO data line 1.
SDIO_CMD
I/O
I/O
I/O
I/O
SDIO_DATA_0
SDIO_DATA_1
SDIO_DATA_2
SDIO data line 2. Also used as a strapping option (see
Table 26 on page 87).
SDIO_DATA_3
J7
I/O
SDIO data line 3
Note: Per Section 6 of the SDIO specification, 10 to 100 kΩ pull-ups are required on the four DATA lines and the CMD line.
This requirement must be met during all operating states by using external pull-up resistors or properly programming internal
SDIO host pull-ups.
WLAN GPIO Interface
WLRF_GPIO
J3
I/O
Test pin. Not connected in normal operation.
Clocks
WLRF_XTAL_XON
WLRF_XTAL_XOP
CLK_REQ
M5
M4
M6
O
I
XTAL oscillator output
XTAL oscillator input
O
External system clock request—Used when the system
clock is not provided by a dedicated crystal (for example,
when a shared TCXO is used). Asserted to indicate to the
host that the clock is required. Shared by BT, and WLAN.
LPO_IN
F5
I
External sleep clock input (32.768 kHz). If an external
32.768 kHz clock cannot be provided, pull this pin low.
However, BLE will be always on and cannot go to deep
sleep.
FM Receiver
FM_OUT1
FM_OUT2
FM_RF_IN
FM_RF_VDD
C2
D2
E1
E2
O
O
I
FM analog output 1
FM analog output 2
FM radio antenna port
FM power supply
I
Bluetooth PCM
PCM or I2S clock; can be master (output) or slave (input)
PCM or I2S data input sensing
BT_PCM_CLK or BT_I2S_CLK
BT_PCM_IN or BT_I2S_DI
A5
C4
B4
B5
I/O
I
PCM or I2S data output
BT_PCM_OUT or BT_I2S_DO
BT_PCM_SYNC or BT_I2S_WS
O
I/O
PCM SYNC or I2S_WS; can be master (output) or slave
(input)
Bluetooth GPIO
BT_GPIO_3
BT_GPIO_4
BT_GPIO_5
F4
G5
H5
I/O
Bluetooth general purpose I/O.WPT_INTb to wireless
charging PMU.
I/O
I/O
Bluetooth general purpose I/O.BSC_SDA to/from
wireless charging PMU.
Bluetooth general purpose I/O.BSC_SCL from wireless
charging PMU.
Document No. 002-14797 Rev. *H
Page 79 of 128
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