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. Power saving
- 3.6. Summary of state transitions
- 3.7. RTC backup
- 3.8. Serial interfaces
- 3.9. Audio interfaces
- 3.10. SIM card interface
- 3.12. Behaviors of the RI
- 3.13. Network status indication
- 3.14. 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
M95 Hardware Design
M95_HD_V1.0 - 23 -
voice-band input
MIC2P
MIC2N
2，
3
I
Channel two of
positive and negative
voice-band input
SPK1N
SPK1P
6,
7
O
Channel one of
positive and negative
voice-band output
If unused, keep these
pins open.
AGND
1
Cooperate with
LOUDSPKP
If unused, keep this
pin open.
LOUDSPKN
LOUDSPKP
8，9
O
Channel two of
positive and negative
voice-band output
1. If unused, keep
these pins open.
2. Embedded
amplifier of class AB
internally.
3. Support both Voice
and ring.
Net status indicator
PIN NAME
PIN
NO.
I/
O
DESCRIPTION
DC
CHARACTERISTICS
COMMENT
NETLIGHT
13
O
Network status
indication
VOHmin=
0.85*VDD_EXT
VOLmax=
0.15*VDD_EXT
If unused, keep this
pin open.
Main UART port
PIN NAME
PIN
NO.
I/
O
DESCRIPTION
DC
CHARACTERISTICS
COMMENT
DTR
20
I
Data terminal ready
VILmin=-0.3V
VILmax=
0.25*VDD_EXT
VIHmin=
0.75*VDD_EXT
VIHmax=
VDD_EXT+0.3V
VOHmin=
0.85*VDD_EXT
VOLmax=
0.15*VDD_EXT
If only use TXD,
RXD and GND to
communicate,
recommended keeping
other pins open,
except RTS. Pull
down RTS.
RXD
21
I
Receiving data
TXD
22
O
Transmitting data
CTS
23
O
Clear to send
RTS
24
I
Request to send
DCD
25
O
Data carrier detection
RI
26
O
Ring indicator
Debug UART port
PIN NAME
PIN
NO.
I/
O
DESCRIPTION
DC
CHARACTERISTICS
COMMENT