Renesas M3A-HS64, User Manual

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M3A-HS64G02 Functions
4.12 I/O Ports
Rev. 1.00 Apr 30, 2009 4-25
REJ11J0034-0100
4
4.12 I/O Ports
SH7264 I/O ports are connected to switches and LEDs on the M3A-HS64G02.
To use ports PH3 to PH0 as key input switches (4 switches x 4 inputs) via an A/D converter (ADC), sets 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 4.12.1 lists the jumper setting (JP14 on the M3A-HS64). Table 4.12.2 lists the port A function
switching.
3.3 V
3.3 V
3.3 V
1.5 K
3.3 V
1.5 K
AVcc
4.7 K
0 1.58 K 4.7 K
SH7264
14 K
3.3 V x 14.0 KR / (14.0 KR + 4.7 KR) = 2.47 V
3.3 V x 4.70 KR / (4.70 KR + 4.7 KR) = 1.65 V
3.3 V x 1.58 KR / (1.58 KR + 4.7 KR) = 0.83 V
3.3 V x 0.00 KR / (0.00 KR + 4.7 KR) = 0V
AVcc
4.7 K
0 1.58 K 4.7 K 14 K
AVcc
4.7 K
0 1.58 K 4.7 K 14 K
AVcc
4.7 K
0 1.58 K 4.7 K 14 K
AN0
AN1
AN2
AN3
AN0
AN1
AN2
AN3
PH0/ AN0
PH3/ AN3
PH2/ AN2
PH1/ AN1
PA0 /MD_BOOT1
PA1 /MD_BOOT0
PA2 /MD_CLK1
PA3 /MD_CLK0
Expansion connector
AVcc
AVcc
AVcc
AVcc
D1
S1A
S1B
D2
S2A
S2B
D3
S3A
S3B
D4
S4A
S4B
MUX
EN# IN
PB22 /A22
BT1
BT0
CK1
CK0
BT1
BT0
CK1
CK0
3.3 V
3.3 V
3.3 V
User DIP switches
(SW6)
System setting DIP switches
(SW5)
NOR flash memory
3.3 V
5
6
1
3
2
3.3 V
JP14
MUX
Note: Pin names in red indicate the function used.
Figure 4.12.1 I/O Ports Block Diagram
Table 4.12.1 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: When using the PH [0:3] as the input port, mount R10 to R13.
Table 4.12.2 Port A Function Switching
Number
High output Low output
PB22
Uses Port A as a user interface Mode sampling (At power-up)