Sensors Interface; Side Keys Interface; Battery Connector Interface - SimCom SIMT 1502 Manual

SHANGHAI SIMCOM LIMITED
Figure4-6 SD interface application diagram

4.9 Sensors interface

SIMT1502 support many sensors via I2C bus, the circuit structure is similar to camera interface.
SIMT1502 does not contain necessary pull_up resistors internal, which must be designed in
external circuit.

4.10 Side keys interface

SIMT1502 contains a few keys interfaces, which can be used as functional side keys.
KYPD_SNS0,KYPD_SNS1and KYPD_SNS2 can compose matrix keyboard, also can be used as
normal configurable GPIO.
See Table4-9 for more details.
Table4-9 Side keys interface description
Signal
KYPD_SNS0
KYPD_SNS1
KYPD_SNS2
PM_KYPD_PWR_N
PM_RESIN_N

4.11 Battery connector interface

Pin# Description
40 Keypad sense bit 0
41 Keypad sense bit 1
42 Keypad sense bit 2
76 Power on key
82 PMIC reset input
Direction
DI/DO
DI
DI
DI
DI
DI
26