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Classification
No.
37
36
35
AUDIO
34
33
32
3.1.14 Network signal indication
The RSSI_LED is driven at high level.
---Power-on status: the LED turns off;
---Network searching status: the LED blinks at 3Hz;
---Idle status: the LED blinks at 1Hz;
---Traffic status (call, data): the LED blinks at 5Hz.
The output status of RSSI_LED PIN is defined according to the software protocol. The RSSI_LED PIN is
a general I/O port with the output driving capability 4mA.
3.2
Module's power consumption
It describes the module's power consumption under each status:
Status
Frequency
Power-off
Sleep
Standby
GSM850
EGSM900
Call
GSM1800
GSM1900
Network
searching
3.3
Reliability characteristics
The module's reliability testing items include: High/low temperature operation, high/low
temperature storage, thermal shock, alternating temperature humidity, etc. The test results must
conform to the industrial requirements. See the module's working temperature in the table below:
This document is not allowed to
transmit without ZTE Corporation's
permission
Table 3-13 Audio interface signal definitions
Definition
I/O
MIC_N0
Input
MIC_P0
Input
MIC_P1
Input
RECN
Output
RECP
Output
EAR_L
Output
Table 3-14 MG2639_V3 (GPRS) power consumption
Rx. power
Min.
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Description
Receiver on the host
Receiver on the host
Receiver on the earpiece
Speaker on the host
Speaker on the host
Speaker on the earpiece
Average
Max.
15uA
2mA
24 mA
240mA
240mA
180 mA
175 mA
78mA
User Manual
Remarks
Differential input
Differential input
Differential output
Single-ended output
Remarks
VBAT=4.0V
17
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