Smart Machine Smart Decision
Figure 46: Keypad detected
Table 23: Pin definition of the keypad interface
Name Pin Function Default state
COL0 62 Pull up
COL1 61 Pull down
COL2 60 Pull down
COL3 59
Keypad matrix column
Pull down
ROW0 58 Pull down
ROW1 57 Pull down
ROW2 56 Pull down
ROW3 55
Keypad matrix row
Pull down
Table 24: Keypad multiplex function
Pin name Pin number Mode 0(default) Mode 1
COL0 62 COL0 GPIO18
COL1 61 COL1 GPIO17
COL2 60 COL2 GPIO16
COL3 59 COL3 GPIO15
ROW0 58 ROW0 GPIO14
ROW1 57 ROW1 GPIO13
ROW2 56 ROW2 GPIO12
ROW3 55 ROW3 GPIO11
Note: Multiplex Function need different software version .
4.13 I2C BUS
The SIM808 provides an I2C interface, it can be driven by either the master or slave and conform to the I2C
specification. It has the following features:
z Compliant master mode operation
SIM808_Hardware Design_V1.00 2014.03.27
47
To Next Page
Loading...
Need help?
General
