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Product Technical Specification
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
1
10
40
41
46
52
53
54
64
66
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*
2
UART1_RI
3
UART1_RTS
41110555
Signal Name
GPIO1
GPIO2
GPIO7
GPIO8
GPIO6
GPIO10
GPIO11
GPIO15
GPIO3
GPIO5
I/O*
O
I
Rev 1.0
Multiplex
UIM1_DET
Description
Signal incoming calls (data only), SMS, etc.
Request to send
Detailed Interface Specifications
I/O
Power Supply Domain
I/O
1.8V
I/O
1.8V
I/O
1.8V
I/O
1.8V
I/O
1.8V
I/O
1.8V
I/O
1.8V
I/O
1.8V
I/O
1.8V
I/O
1.8V
November 01, 2017
28
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