User's Manual

Smart Machine Smart Decision

SIM5360A_User_Manual_V1.03 2014-07-03

3.6.1 Pin Description

Table 14: Pin description

3.6.2 Signal Description

Both SDA and SCL are bidirectional lines, connected to a positive supply via a pull-up resistor

respectively. When the bus is free, both lines are high.

3.6.3 Design Guide

For SIM5360, the data on the I2C bus can be transferred at rates up to 400kbps. The number of peripheral

devices connected to the bus is solely dependent on the bus capacitance limit of 400pF. Note that PCB

traces length and bending are in users’ control to minimize load capacitance.

Note

：

SDA and SCL have none pulled up resistors in module. So there is need to pull them up in users’

application circuit.

3.7 Keypad Interface

SIM5360A module provides a keypad interface that supports five sense lines, or columns, and five keypad

rows. The interface generates an interrupt when any key is pressed. Its operation voltage is 1.8V.

3.7.1 Pin Description

Table 15: Pin description

Pin name Pin No. Function

KBC0 28

Sensing keys

KBC1 27

KBC2 31

KBC3 32

Pin name Pin No. Function

SDA 56 Serial interface data input and output

SCL 55 Serial interface clock input