Automotive Module Series
AG521R-NA QuecOpen
Hardware Design
AG521R-NA_QuecOpen_Hardware_Design 26 / 104
UART1_TXD
70
DO
UART1 transmit
V
OL
max = 0.45 V
V
OH
min = 1.35 V
UART1_RXD
72
DI
UART1 receive
V
IL
min = -0.3 V
V
IL
max = 0.63 V
V
IH
min = 1.17 V
V
IH
max = 2.1 V
BT UART Interface
Pin Name
Pin No.
I/O
Description
DC
Characteristics
Comment
BT_UART_TXD
59
DO
BT UART transmit
V
OL
max = 0.45 V
V
OH
min = 1.35 V
1.8 V power domain.
Can be configured to
GPIO.
If unused, keep them
open.
BT_UART_RXD
63
DI
BT UART receive
V
IL
min = -0.3 V
V
IL
max = 0.63 V
V
IH
min = 1.17 V
V
IH
max = 2.1 V
BT_UART_RTS
61
DI
BT UART request to
send
V
IL
min = -0.3 V
V
IL
max = 0.63 V
V
IH
min = 1.17 V
V
IH
max = 2.1 V
BT_UART_CTS
62
DO
BT UART clear to
send
V
OL
max = 0.45 V
V
OH
min = 1.35 V
Debug UART Interface
Pin Name
Pin No.
I/O
Description
DC
Characteristics
Comment
DBG_RXD
110
DI
Debug UART receive
V
IL
min = -0.3 V
V
IL
max = 0.63 V
V
IH
min = 1.17 V
V
IH
max = 2.1 V
1.8 V power domain.
DBG_TXD
107
DO
Debug UART
transmit
V
OL
max = 0.45 V
V
OH
min = 1.35 V
I2C1 Interface (for Codec Configuration by Default)
Pin Name
Pin No.
I/O
Description
DC
Characteristics
Comment
I2C1_SCL
79
OD
I2C1 serial clock
External pull-up
resistor is required.
1.8 V only.
Can be configured to
GPIO.
If unused, keep them
open.
I2C1_SDA
80
OD
I2C1 serial data
