41110555
Rev 1.0
November 01, 2017
17
2. Pad Definition
AirPrime HL77xx pads are divided into 2 functional categories.
•
Core functions and associated pads
cover all the mandatory features for M2M connectivity and will be available by default across all CF
3
family of
modules. These Core functions are always available and always at the same physical pad locations. A customer platform using only these functions
and associated pads are guaranteed to be forward and/or backward compatible with the next generation of CF
3
modules.
•
Extension functions and associated pads
bring additional capabilities to the customer. Whenever an Extension function is available on a module, it
is always at the same pad location.
Other pads marked as “not connected” or “reserved” should not be used.
Table 5.
Pin Definition
Pad #
Signal Name
Function
I/O
Active
Low/High
Power
Supply
Domain
Recommendation
for Unused Pads
Type
1
GPIO1
General purpose input/output
I/O
-
1.8V
Left Open
Extension
2
UART1_RI
UART1 Ring indicator
O
-
1.8V
Connect to test point
Core
3
UART1_RTS
UART1 Request to send
I
L
1.8V
Connect to test point
Core
4
UART1_CTS
UART1 Clear to send
O
L
1.8V
Connect to test point
Core
5
UART1_TX
UART1 Transmit data
I
-
1.8V
Connect to test point
Core
6
UART1_RX
UART1 Receive data
O
-
1.8V
Connect to test point
Core
7
UART1_DTR
UART1 Data terminal ready
I
L
1.8V
Connect to test point
Core
8
UART1_DCD
UART1 Data carrier detect
O
L
1.8V
Connect to test point
Core
9
UART1_DSR
UART1 Data set ready
O
L
1.8V
Connect to test point
Core
10
GPIO2
General purpose input/output
I/O
-
1.8V
Connect to test point
Core
11
RESET_IN_N
Input reset signal
I
L
1.8V
Left Open
Core
