Quectel AF20 - Page 19

Wi-Fi&Bluetooth Module Series
AF20_Hardware_Design
18
/ 49
V
IH
min = 1.26 V
V
IH
max = 2.0 V
PCM_IN
13
DI
PCM data input
V
IL
min = -0.3 V
V
IL
max = 0.54 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
1.8 V power domain.
If unused, keep these
pins open.
PCM_SYNC
14
DI
PCM data frame
synchronization
signal
V
IL
min = -0.3 V
V
IL
max = 0.54 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
PCM_CLK
15
DI
PCM clock signal
V
IL
min = -0.3 V
V
IL
max = 0.54 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
PCM_OUT
16
DO
PCM data output
V
OL
max = 0.18 V
V
OH
min = 1.62 V
BT_UART_
RTS
7
DO
Bluetooth UART
request to send
V
OL
max = 0.18 V
V
OH
min = 1.62 V
BT_UART_
CTS
8
DI
Bluetooth UART
clear to send
V
IL
min = -0.3 V
V
IL
max = 0.54 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
BT_UART_
TXD
17
DO
Bluetooth UART
transmit
V
OL
max = 0.18 V
V
OH
min = 1.62 V
BT_UART_
RXD
18
DI
Bluetooth UART
receive
V
IL
min = -0.3 V
V
IL
max = 0.54 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
HOST_WAK
E_BT
42
DI
Host wake up
Bluetooth
V
IL
min = -0.3 V
V
IL
max = 0.54 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
1.8 V power domain.
Pull-up at bootup is
prohibited.
Pull down to the
ground if unused.
BT_WAKE_H
OST
46
DO
Bluetooth wake up
host
V
OL
max = 0.18 V
V
OH
min = 1.62 V
Coexistence UART
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
LTE_UART_
TXD
5
DO
LTE/Wi-Fi &
Bluetooth
coexistence signal -
transmit data
V
OL
max = 0.18 V
V
OH
min = 1.62 V
1.8 V power domain.
If unused, keep these
pins open.
QCOM private
protocol, and these
pins cannot be used
LTE_UART_
6
DI
LTE/Wi-Fi &
V
IL
min = -0.3 V