CYW4343X
Table 22. WLBGA Signal Descriptions (Cont.)
Signal Name
WLBGA Ball
Type
Description
Bluetooth UART and Wake
BT_UART_CTS_N
B2
C3
A1
A2
I
UART clear-to-send. Active-low clear-to-send signal for
the HCI UART interface.
BT_UART_RTS_N
BT_UART_RXD
BT_UART_TXD
O
I
UART request-to-send. Active-low request-to-send
signal for the HCI UART interface.
UART serial input. Serial data input for the HCI UART
interface.
O
UART serial output. Serial data output for the HCI UART
interface.
BT_DEV_WAKE
BT_HOST_WAKE
B1
C1
I/O
I/O
DEV_WAKE or general-purpose I/O signal.
HOST_WAKE or general-purpose I/O signal.
Note: By default, the Bluetooth BT WAKE signals provide GPIO/WAKE functionality, and the UART pins provide UART functionality.
Through software configuration, the PCM interface can also be routed over the
BT_WAKE/UART signals as follows:
•
•
•
•
PCM_CLK on the UART_RTS_N pin
PCM_OUT on the UART_CTS_N pin
PCM_SYNC on the BT_HOST_WAKE pin
PCM_IN on the BT_DEV_WAKE pin
In this case, the BT HCI transport included sleep signaling will operate using UART_RXD and UART_TXD; that is, using a 3-Wire UART
Transport.
Bluetooth/FM I2S
I2S or PCM clock; can be master (output) or slave (input)
I2S or PCM data output
BT_I2S_CLK or BT_PCM_CLK
BT_I2S_DO or BT_PCM_OUT
BT_I2S_WS or BT_PCM_SYNC
A4
B3
A3
I/O
I/O
I/O
I2S WS or PCM sync; can be master (output) or slave
(input)
Miscellaneous
WL_REG_ON
BT_REG_ON
G6
E6
I
Used by PMU to power up or power down the internal
regulators used by the WLAN section. Also, when
deasserted, this pin holds the WLAN section in reset.
This pin has an internal 200 k pull-down resistor that is
enabled by default. It can be disabled through
programming.
I
Used by PMU to power up or power down the internal
regulators used by the Bluetooth/FM section. Also, when
deasserted, this pin holds the Bluetooth/FM section in
reset. This pin has an internal 200 k pull-down resistor
that is enabled by default. It can be disabled through
programming.
WPT_3P3
WPT_1P8
GPIO_0
E5
D5
J6
N/A
N/A
I/O
Not used. Do not connect to this pin.
Not used. Do not connect to this pin.
Programmable GPIO pins. This pin becomes an output
pin when it is used as WLAN_HOST_WAKE/out-of-band
signal.
GPIO_1
H6
L5
K4
K5
J1
I/O
I/O
I/O
I/O
I
Programmable GPIO pins
Programmable GPIO pins
Programmable GPIO pins
Programmable GPIO pins
GPIO_2
GPIO_3
GPIO_4
WLRF_2G_eLG
Connect to an external inductor. See the reference
schematic for details.
Document No. 002-14797 Rev. *H
Page 80 of 128
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