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Product Technical Specification
3.12. Clock Interface
The AirPrime HL77xx modules support two digital clock interfaces.
Enabling or disabling the clock out feature can be done using AT commands. For more information
about AT commands, refer to document [2] AirPrime HL77xx AT Commands Interface Guide.
Refer to the following table for the pad description of the clock out interfaces.
Table 26.
Clock Interface Pad Description
Pad Number
22
23
3.13. Debug Interface
The AirPrime HL77xx modules provide a 2-wire debug port interface.
Table 27.
Software Trace Pad Description
Pad Number
44
51
*
According to module view.
Note:
It is strongly recommended to provide access through Test Points to this interface.
3.14. JTAG Interface
The JTAG interface provides debug access to the core of the AirPrime HL77xx modules. These JTAG
signals are accessible through solder-able test points.
Refer to the following table for the pad description of the JTAG interface.
Table 28.
JTAG Pad Description
Pad Number
236
237
238
239
240
241
Note:
It is recommended to provide access through Test Points to this interface the JTAG pads (for Failure
Analysis debugging). All signals listed in the table above should be outputs on the customer board to
allow JTAG debugging.
41110555
Signal Name
GNSS_FREQ_OUT
32K_CLKOUT
Signal Name*
DEBUG_TX
DEBUG_RX
Signal Name
JTAG_RESET
JTAG_TCK
JTAG_TDO
JTAG_TMS
JTAG_TRST
JTAG_TDI
Rev 1.0
I/O
I/O Type
O
1.8V
O
1.8V
I/O*
I/O Type
O
1.8V
I
1.8V
Detailed Interface Specifications
Description
26MHz Digital Clock output
32.768kHz Digital Clock output
Description
Debug Transmit Data
Debug Receive Data
Function
JTAG RESET
JTAG Test Clock
JTAG Test Data Output
JTAG Test Mode Select
JTAG Test Reset
JTAG Test Data Input
November 01, 2017
32
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