HUAWEI EM770 HSPA PC Embedded Module V100R001
Product Specification
Issue 1
(2008-09-15)
Huawei Confidential: This documents is Huawei Proprietary and Confidential(NDA
Required).It may not be duplicated, neither distributed externally without
prior and written permission of Huawei.
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J501: You can manually control the signal (EARMUTE) for muting the earphone
used for the PCM voice function. When you connect the jumper header to the
left of the J502 (EARMUTE is driven to the high level), the earphone is muted.
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J503: You can manually control the signal (COMP_SEL) for selecting the
working mode of the PCM voice function. When you connect the jumper header
to the left of J530 (COMP_SEL is grounded and driven to the low level), the 13-
bit linear mode is selected; when you connect the jumper header to the right of
J503, the 8-bit compressed mode is selected.
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J504: You can manually control the reset signal (PCM_RESET) of the PCM
voice function. When you connect the jumper header to the bottom of J204
(PCM_RESET is driven to the low level), the PCM function is reset; when you
remove the jumper header, the PCM function works normally.
Though controlling the module states manually, you can test the performance and
parameter in each state by using the CMU200 or other matching software.
2.
Testing the key signals
On the debugging board, the test points of all signification signals are led out for
testing. Figure 5-27 shows positions of the test points.
Figure 5-27
Test point position
The test points shown in the previously figure are described as follows:
TS408: WAKE_NB_N (signal that the module uses to activate the PC)
TS406: WAKEUP_N (signal that the PC uses to wake up the module)
TS407:W_DISABLE_N (signal for disabling the RF function of the module)
TS409: PERST_N (module reset signal)
TS201: MIC_P (input signal of micr)
TS202: MIC_N (input signal of microphone
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