Renesas M3A-HS64, User Manual

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M3A-HS64G01 Functions
3.10 I/O Ports
Rev. 1.00 Apr 30, 2009
3-24
REJ11J0034-0100
3
3.10 I/O Ports
SH7264 I/O ports are connected to switches and LEDs on the M3A-HS64G01.
To use ports PH3 to PH0 as key input switches (4 switches x 4 inputs) via an A/D converter (ADC), set the ports as analog input
pins (AN3 to AN0).
Port A can be used as a user interface by setting PB22 pin to high output.
The figure below shows the I/O ports block diagram. Table 3.10.1 lists the jumper setting (JP14 on the M3A-HS64).
Table 3.10.2 lists the port A function switching.
Figure 3.10.1 I/O Ports Block Diagram
Table 3.10.1 Jumper Setting (JP14 on the M3A-HS64)
Number 1-2 None (Open)
JP14
Uses PH[0:3] as an input port (default)
(1)
Uses PH[0:3] as an analog input pin
Note 1: Mount R10 to R13 when using PH [0:3] as an input port.
Table 3.10.2 Port A Function Switching
Number High output Low output
PB22
Uses Port A as a user interface Mode sampling (At power-up)