User's Manual
Table Of Contents
- Contents
- Table Index
- Figure Index
- 0. Revision history
- 1. Introduction
- 2. Product concept
- 3. Application interface
- 3.1. Pin
- 3.2. Operating modes
- 3.3. Power supply
- 3.4. Power on and down scenarios
- 3.5. Charging interface
- 3.6. Power saving
- 3.7. Summary of state transitions
- 3.8. RTC backup
- 3.9. Serial interfaces
- 3.10. Audio interfaces
- 3.11. SIM card interface
- 3.12. SD card interface
- 3.13. PCM interface
- 3.14. ADC
- 3.15. Behaviors of the RI
- 3.16. Network status indication
- 3.17. Operating status indication
- 4. Antenna interface
- 5. Electrical, reliability and radio characteristics
- 6. Mechanical dimensions
- 7. Storage and manufacturing
- Appendix A: GPRS coding schemes
- Appendix B: GPRS multi-slot classes
M80 Hardware Design
M80_HD_V1.2 - 25 -
NO.
CHARACTERISTICS
EMERG_
OFF
17
I
Emergency off.
Pulled down for at
least 20ms, which
will turn off the
module in case of
emergency. Use it
only when normal
shutdown through
PWRKEY or AT
command can’t
perform well.
VILmax=0.4V
VIHmin=2.2V
V
open
max=2.8V
Open
drain/collector
driver required in
cellular device
application.
If unused, keep
this pin open.
Module indicator
PIN NAME
PIN
NO.
I/O
DESCRIPTION
DC
CHARACTERISTICS
COMMENT
STATUS
16
O
Indicate module
operating status.
High level
indicates module is
power-on and low
level indicates
power-down.
VOHmin=
0.85×VDD_EXT
VOLmax=
0.15×VDD_EXT
If unused, keep
this pin open.
Audio interface
PIN NAME
PIN
NO.
I/O
DESCRIPTION
DC
CHARACTERISTICS
COMMENT
MIC1P
MIC1N
9，10
I
Channel one for
positive and
negative
voice-band input
If unused, keep
these pins open.
MIC2P
MIC2N
7，8
I
Channel two for
positive and
negative
voice-band input
SPK1P
SPK1N
12,11
O
Channel one for
positive and
negative
voice-band output
If unused, keep
these pins open.
SPK2P
AGND
5,6
O
Channel two for
voice-band output
1. If unused,
keep these pins
open.
2. Support both
voice and ring.
LOUDSPKN
13，
O
Channel three of
1. If unused,