Hardware Guide

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3.2 UART and SPI Interface
The module provides one 2-wire UART interface. As the UART interface supports signal control through
standard modem handshake, Software commands are entered and serial communication is performed through the
UART interface.
The baud rates supported are shown below: 300 bps, 600 bps, 1200 bps, 2400 bps, 4800 bps, 9600 bps, 19200 bps,
38400 bps, 57600 bps, 115200 bps, 230400 bps, 460800 bps, 921600 bps, 2764800 bps.
Table 3-3 UART interface signals
Pin No.
Pin Name
Pad Type
Description
Typ. (V)
P17
CP_UART_TX
O
UART transmit data output for debug
1.8
P15
CP_UART_RX
I
UART receive data input for debug
1.8
Figure 3-2 Recommended connection of the UART interface in the module with the host
In addition, the module provides a SPI interface.
Table 3-4 SPI interface signals
Pin No.
Pin Name
Pad Type
Description
Typ. (V)
R11
CP_SPI_MISO
O
SPI interface data output
1.8
R09
CP_SPI_MOSI
I
SPI interface data input
1.8
Q12
CP_S PI_C L K
I/O
SPI interface clock
1.8
Q10
CP_SPI_CSN
I/O
SPI interface chip select
1.8
Figure 3-3 Recommended connection of the SPI interface