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2
2.2 CPU
The M3A-HS25 contains the 32-bit RISC microcomputer SH7125 that operates with a maximum 50MHz of CPU
clock frequency. The SH7125 includes 128-Kbyte flash memory, and 8-Kbyte SRAM, making it useful in a wide range
of applications from data processing to equipment control.
The M3A-HS25 can be operated with a maximum 50MHz of CPU clock frequency using a 12.5MHz input clock.
Figure2.2.1 shows the block diagram of SH7125 in the M3A-HS25.
EXTAL
XTAL
Clock
System
WDTOVF
Control
RES
MD1
Mode
FWE/ASEBRK/ASEBRKAK
PA4/IRQ2/TXD1/TMS
H-UDI
PA3/IRQ1/RXD1/TRST
PA7/TCLKB/SCK2/TCK
PA8/TCLKC/RXD2/TDI
PA9/TCLKD/TXD2/TDO/POE8
ASEMD0
Interrupt
NMI
Switch
PA2/IRQ0/SCK0
PE9/TIOC3B
PE11/TIOC3D
PE12/TIOC4A
User LED
PE13/TIOC4B/MRES
PE14/TIOC4C
PE15/TIOC4D/IRQOUT
PB1/TIC5W
DIP Switch
PB2/IRQ0/POE0
for user
PB3/IRQ1/POE1/TIC5V
PB5/IRQ3/TIC5U
Rev.1.0 July 21, 2006
REJ10J0952-0100
SH7125
Serial Port
Connector
Serial Port
Connector
Figure2.2.1 Block Diagram of SH7125
Functional Overview
PA0/POE0/RXD0
PA1/POE1/TXD0
PA5/IRQ3/SCK1
PA6/TCLKA
PA10/RXD0
PA11/TXD0/ADTRG
PA12/SCK0
PA13/SCK1
PA14/RXD1
PA15/TXD1
PB16/POE3
PE0/TIOC0A
PE1/TIOC0B/RXD0
PE2/TIOC0C/TXD0
PE3/TIOC0D/SCK0
PE4/TIOC1A/RXD1
PE5/TIOC1B/TXD1
PE6/TIOC2A/SCK1
PE7/TIOC2B
PE8/TIOC3A
PE10/TIOC3C
PF0/AN0
PF1/AN1
PF2/AN2
PF3/AN3
PF4/AN4
PF5/AN5
PF6/AN6
PF7/AN7
2.2 CPU
GPIO/SCI/
MTU2/IRQ/
POE
A/D
Converter
2-3
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