USING THE UNIVERSAL DEVELOPER'S KIT
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LZT 123 8020 R1A
12.5 RF Interface
A MMCX connector, J402, is provided on the Developer's board
and routed to a SMA connector, J401. This allows a standard
cellular antenna with SMA connector to be used if the module
has a non-SMA connector mounted on it. An MMCX to MMCX
RF Jumper is provided to connect from the module to J402.
12.6 Audio Interface
Analog audio is routed to/from the Developer Kit in two ways
and is controlled by switches S201 and S202:
1 Via a 2.5mm stereo jack at J201 (S201 set to “Pre-Amp” and
S202 is “ON”). Used with hands-free set.
2 Via ATMS and AFMS (S201 set to “Bypass” and S202 is
“OFF”).
3 The Gx-47/48 platform does not require the external pre-
amp. Set S201 to “Bypass” and S202 to “OFF”.
Analog audio is provided on pins 7 and 10 of the system
connector header as presented below:
Pin Signal Description
7
AFMS
Audio Output From Module (referenced to AGND)
10
ATMS
Audio Input to Module (referenced to AGND)
9
AGND
Analog Reference
Digital audio is provided on pins 17, 18, 19 and 20 of the
system connector header. The application must ensure
providing the correct levels on the PCM signals according to the
Digital Audio section of the appropriate Integrator's Manual. The
PCM signals available in the system connector header are
presented below:
Pin Signal
Description
17
PCMCLK
PCM Clock Output from module.
18
PCMSYNC
PCM Frame Sync Output from module.
19
PCMULD
PCM Voice Input to module.
20
PCMDLD
PCM Voice Output from module.
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