41110555
Rev 1.0
November 01, 2017
28
Product Technical Specification
Detailed Interface Specifications
3.7. General Purpose Input/Output (GPIO)
The AirPrime HL77xx modules provide 10 GPIOs, 1 of which has a multiplex.
The following table describes the pin description of the GPIO interface.
Table 18. GPIO Pad Description
Pad Number
Signal Name
Multiplex
I/O
Power Supply Domain
1
GPIO1
I/O
1.8V
10
GPIO2
I/O
1.8V
40
GPIO7
I/O
1.8V
41
GPIO8
I/O
1.8V
46
GPIO6
I/O
1.8V
52
GPIO10
I/O
1.8V
53
GPIO11
I/O
1.8V
54
GPIO15
I/O
1.8V
64
GPIO3
UIM1_DET
I/O
1.8V
66
GPIO5
I/O
1.8V
3.8. Main Serial Link (UART1)
The main serial link (UART1) is used for communication between the AirPrime HL77xx modules and a
PC or host processor. It consists of a flexible 8-wire serial interface that complies with RS-232 interface.
The main serial link (UART1) is an asynchronous serial interface.
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.
Refer to the following table for the pad description of the main serial link (UART1) interface.
Table 19. UART1 Pad Description
Pad Number Signal Name*
I/O*
Description
2
UART1_RI
O
Signal incoming calls (data only), SMS, etc.
3
UART1_RTS
I
Request to send
