4117047
Rev 2.2
December 18, 2015
28
Product Technical Specification
Detailed Interface Specifications
Pin Number
Signal Name
Multiplex
I/O
Power Supply Domain
53
GPIO11
I/O
1.8V
54
GPIO15
I/O
1.8V
58
GPIO12
PWM2
I/O
1.8V
64
GPIO3
UIM1_DET
I/O
1.8V
65
GPIO4
I/O
1.8V
66
GPIO5
I/O
1.8V
*
This pin can be used to trigger the module to wake up from Sleep Mode.
2.11. Main Serial Link (UART1)
The main serial link (UART1) is used for communication between the AirPrime HL8518, HL8528 and
HL8529 modules and a PC or host processor. It consists of a flexible 8-wire serial interface that
complies with RS-232 interface.
The supported baud rates of the UART1 are 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600,
115200, 230400, 460800, 500000, 750000, 921600, 1843200, 3000000, 3250000 and 6000000 bit/s.
The signals used by UART1 are as follows:
TX data (UART1_TX)
RX data (UART1_RX)
Request To Send (UART1_RTS)
Clear To Send (UART1_CTS)
Data Terminal Ready (UART1_DTR)
Data Set Ready (UART1_DSR)
Data Carrier Detect (UART1_DCD)
Ring Indicator (UART1_RI)
Note:
Signal names are according to PC view.
2.11.1. Pin Description
The following table describes the pin description of the UART1 interface.
Table 21. UART1 Pin Description
Pin # Signal Name*
I/O*
Description
2
UART1_RI
O
Signal incoming calls (voice and data), SMS, etc.
3
UART1_RTS
I
Wakes the module up when
AT+KSLEEP=1
is used
4
UART1_CTS
O
Ready to receive AT commands
5
UART1_TX
I
Transmit data
6
UART1_RX
O
Receive data
7
UART1_DTR
I
(active low)
Prevents the module from entering sleep mode, switches between
data mode and command mode, and wakes the module up.
8
UART1_DCD
O
Signal data connection in progress
9
UART1_DSR
O
Signal UART interface is ON
*
According to PC view.
