Document No. 002-14949 Rev. *E
Page 64 of 113
PRELIMINARY
CYW43353
Table 20. Multiplexed GPIO Signals
Pin Name
Type
Description
UART_CTS_N
I
Host UART clear to send.
UART_RTS_N
O
Device UART request to send.
UART_RXD
I
Device UART receive data.
UART_TXD
O
Host UART transmit data.
PCM_IN
I
PCM data input.
PCM_OUT
O
PCM data output.
PCM_SYNC
I/O
PCM sync signal, can be master (output) or slave (input).
PCM_CLK
I/O
PCM clock, can be master (output) or slave (input).
GPIO[7:0]
I/O
General-purpose I/O.
A_GPIO[7:0]
I/O
A group general-purpose I/O.
I2S_MSDO
O
I
2
S master data output.
I2S_MWS
O
I
2
S master word select.
I2S_MSCK
O
I
2
S master clock.
I2S_SSCK
I
I
2
S slave clock.
I2S_SSDO
O
I
2
S slave data output.
I2S_SWS
I
I
2
S slave word select.
I2S_SSDI/MSDI
I
I
2
S slave/master data input.
STATUS
O
Signals Bluetooth priority status.
TX_CON_FX
I
WLAN-BT coexist. Transmission confirmation; permission for BT to transmit.
RF_ACTIVE
O
WLAN-BT coexist. Asserted (logic high) during local BT RX and TX slots.
LINK_IND
O
BT receiver/transmitter link indicator.
CLK_REQ
O
WLAN/BT clock request output.
SF_SPI_CLK
O
SFlash SCLK: serial clock (output from master).
SF_MISO
I
SFlash MISO; SOMI: master input, slave output (output from slave).
SF_MOSI
O
SFlash MOSI; SIMO: master output, slave input (output from master).
SF_SPI_CSN
O
SFlash SS: slave select (active low, output from master).