Turn On The Gps Part - SimCom SIM548C HD V1.01 Hardware Design

SIM548C Hardware Design
GPS_WAKEUP
Table 28: Consolidated PIN Characteristics
PIN
GPS_TXA
GPS_RXA
GPS_TXB
GPS_RXB

4.4 Turn on the GPS part

To turn on the GPS module, the GPS_VCC must be higher than 2.3V, and should be kept on for
220ms at least. The theory of turning on is shown in the following figure:
SIM548C_HD_V1.01
I It only be used to wakeup the system
from PTF mode. If not used, the user
must connect this pin to the ground
through a 0R resistor.
66
Default Direction
O
I
O
I
09.05.2008