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 - 23 -
73
CHGLDO
I
74
GATDRV
O
75
RESERVED
76
RESERVED
77
RESERVED
78
RESERVED
79
RESERVED
80
RESERVED
81
RESERVED
82
RESERVED
83
RESERVED
84
RESERVED
85
RESERVED
86
RESERVED
87
RESERVED
88
RESERVED
89
RESERVED
90
RESERVED
91
RESERVED
92
RESERVED
93
GND
94
GND
95
RESERVED
96
RESERVED
97
RESERVED
98
RESERVED
99
RESERVED
100
RESERVED
101
RESERVED
102
RESERVED
103
RESERVED
104
RESERVED
105
RESERVED
106
RESERVED
107
RESERVED
108
RESERVED
109
RESERVED
110
RESERVED
Note: Keep all reserved pins open.
3.1.2. Pin description
Table 6: Pin description
Power supply
PIN NAME
PIN
NO.
I/O
DESCRIPTION
DC
CHARACTERISTICS
COMMENT
VBAT
67,
68,
69
I
Main power supply
of module:
VBAT=3.3V~4.6V
Vmax= 4.6V
Vmin=3.3V
Vnorm=4.0V
Make sure that
supply sufficient
current in a
transmitting
burst which
typically rises to
1.6A.
VRTC
59
I/O
Power supply for
RTC when VBAT
is not supplied for
the system.
Charging for
VImax=VBAT
VImin=2.6V
VInorm=2.8V
VOmax=2.85V
VOmin=2.6V
If unused, keep
this pin open.