Document No. 002-14949 Rev. *E
Page 58 of 113
PRELIMINARY
CYW43353
WLAN GPIO Interface
Note:
The GPIO signals can be multiplexed via software and the JTAG_SEL pin to behave as various specific functions. See
GPIO/SDIO Alternative Signal Functions,”
for additional details.
B6
GPIO_0
I/O
Programmable GPIO pins.
Note:
These GPIO signals can be configured by software: as either
inputs or outputs, to have internal pull-ups or pull-downs enabled or
disabled, and to use either a high or low polarity upon assertion.
C6
GPIO_1 I/O
D6
GPIO_2
I/O
B5
GPIO_3
I/O
C5
GPIO_4
I/O
D5
GPIO_5
I/O
C4
GPIO_6
I/O
D4
GPIO_7
I/O
H1
GPIO_8
I/O
JTAG Interface
E5
JTAG_SEL
I/O
JTAG select. Pull high to select the JTAG interface. If the JTAG
interface is not used, this pin may be left floating or connected to
ground.
Note:
See
Table 21, “CYW43353 GPIO/SDIO Alternative Signal
for the JTAG signal pins.
Clocks
H12
WRF_XTAL_IN
I
XTAL oscillator input.
J12
WRF_XTAL_OUT
O
XTAL oscillator output.
B4
LPO_IN
I
External sleep clock input (32.768 kHz).
H3
CLK_REQ
O
Reference clock request (shared by BT and WLAN).
Miscellaneous
N2
NCF
–
No Connect
K1
NCF
–
No Connect
L1
NCF
–
No Connect
Bluetooth PCM
G2
BT_PCM_CLK/BT_PCMCLK
I/O
PCM clock; can be master (output) or slave (input).
G1
BT_PCM_IN
I
PCM data input.
J3
BT_PCM_OUT
O
PCM data output.
H2
BT_PCM_SYNC
I/O
PCM sync; can be master (output) or slave (input).
Bluetooth UART
E6
BT_UART_CTS_N/
BT_UART_CTS
I
UART clear-to-send. Active-low clear-to-send signal for the HCI
UART interface.
F6
BT_UART_RTS_N/
BT_UART_RTS/BT_LED
O
UART request-to-send. Active-low request-to-send signal for the
HCI UART interface. BT LED control pin.
G6
BT_UART_RXD/
BT_RFDISABLE2
I
UART serial input. Serial data input for the HCI UART interface.
BT RF disable pin 2.
F7
BT_UART_TXD
O
UART serial output. Serial data output for the HCI UART
interface.
Bluetooth/FM I2S
J6
BT_I2S_CLK
I/O
I
2
S clock, can be master (output) or slave (input).
K6
BT_I2S_DO
I/O
I
2
S data output.
Table 15. WLBGA Signal Descriptions (Cont.)
WLBGA
Ball#
Signal Name
Type
Description