Enfora MLG0208PB001 ユーザーズマニュアル

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Enfora Enabler II-G Assisted GPS 
Modem Integration Guide 
 
6.6.4.  Reset (Pin 22) 
 
A pulse on this Active-High input resets/restarts the module.  This input has a “weak 
pull-up” resistor internal to the module and can be left open-circuit if it is not going to 
be used.  To initiate a reset, provide a high-pulse of at least 50 ms duration.   
 
Figure 13 shows a Reset, or power down sequence using the RESET signal with the CPU to Enfora Enabler II-G A-
GPS interface.  Note that the I/O and serial lines MUST be either tri-stated or pulled to GND.  If this is not done, it 
cannot be guaranteed that RESET will reset the Enfora Enabler II-G A-GPS. 
 
Figure 13 RESET (using external processor) 
 
 
6.6.5. Using 
VBAK 
 
VBAK
 is a backup voltage that can maintain the RTC clock and alarm functions.  If VBAK is not 
present in the system (intentionally or not) and RADIO_PWR/RST is active low, the RTC clock 
may still be powered if leakage voltage exists on VCC.  Otherwise the RTC clock will loose power 
and be reset when VCC is restored. 
 
 
PARAMETER
 
PARAMETER / CONDITIONS
 
MIN 
TYP 
MAX 
UNIT 
Backup Voltage (Real-Time-Clock) 
V
BACKUP
Backup Voltage for Real-Time-Clock 
2.7 
3.0 
4.5 
Vdc 
I
BACKUP
Input Current (V
BACKUP
 = 3.2 V, V
BAT
 = 0 V, 
No Load on GPIO or Serial Port) 
 
3.0 
6.0 
μAdc 
RESET 
MLG0208PB001 
32 
Version1.01 – 10/3/2006