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Functional Overview
2.2 CPU
Rev.1.04
2008.7.10
2-3
REJ10J1564-0104
2
2.2 CPU
The M3A-HS85 contains the 32-bit RISC microcomputer SH7285 that operates with a maximum 100MHz of CPU
clock frequency. The SH7285 includes 768-Kbyte flash memory, and 32-Kbyte RAM, making it useful in a wide range
of applications from data processing to equipment control.
The M3A-HS85 can be operated with a maximum 100MHz of CPU clock frequency (external bus maximum 50
MHz) using a 12.5 MHz input clock.
Figure 2.2.1 shows the SH7285 block diagram in the M3A-HS85.
EXTAL
XTAL
PA15/CK
MD1
MD0
RES
NMI
WDTOVF
SH7285
Clock
Mode
SW
System
control
LED for
user
DIP
switch
for user
A/D
Address bus
Data bus
H-UDI
Serial port,
Extension connector
(J13)
AUD
PF0/AN0
PF1/AN1
PF2/AN2
PF3/AN3
PF4/AN4
PF5/AN5
PF6/AN6
PF7/AN7
PC0/A0/POE0
PC1/A1
PC2/A2
PC3/A3
PC4/A4
PC5/A5
PC6/A6
PC7/A7
PC8/A8
PC9/A9
PC10/A10
PC11/A11
PC12/A12
PC13/A13/IRQ0
PC14/A14/IRQ1
PC15/A15/IRQ2
PB0/A16/IRQ3
PB1/A17/REFOUT/ADTRG/IRQ4
PB6/A18/BACK/POE3/IRQ5/RXD0
PB7/A19/BREQ/POE4/IRQ6/TXD0
PB8/A20/WAIT/POE8/IRQ7/SCK0
PD0/D0
PD1/D1
PD2/D2/TIC5U
PD3/D3/TIC5V
PD4/D4/TIC5W
PD5/D5/TIC5US
PD6/D6/TIC5VS
PD7/D7/TIC5WS
PD8/D8/TIOC3AS
PD9/D9/TIOC3CS
PD10/D10/TIOC3BS
PD11/D11/TIOC3DS
PD12/D12/TIOC4AS
PD13/D13/TIOC4BS
PD14/D14/TIOC4CS
PD15/D15/TIOC4DS
PA0/RXD0/CS0/TDI
PA1/TXD0/CS1/TDO
PA2/SCK0/SCS/CS2/TCK
PA3/RXD1/SSI/CS3/TMS
PA4/TXD1/SSO/CS4/TRST
ASEMD0
PB2/SCL/POE1/IRQ0
PB3/SDA/POE2/IRQ1
PD16/IRQ0/CS3/AUDATA0
PD17/IRQ1/POE5/SCK3/CS2/AUDATA1
PD18/IRQ2/POE6/TXD3/CS1/AUDATA2
PD19/IRQ3/POE7/RXD3/CS0/AUDATA3
PD22/IRQ6/TIC5US/RXD4/AUDSYNC
PD24/DREQ0/TIOC4DS/AUDCK
USBXTAL
USBEXTAL
PB9/USPND
VBUS
USD+
USD-
PB10
PE9/TIOC3B/FRAME
PE11/TIOC3D
PE12/TIOC4A
PE13/TIOC4B/MRES
PE14/DACK0/TIOC4C/AH
PE15/DACK1/TIOC4D/IRQOUT
PE0/TIOC0A/TIOC4AS/DREQ0
PE1/TIOC0B/TIOC4BS/TEND0
PE2/TIOC0C/TIOC4CS/DREQ1
PE3/TIOC0D/TIOC4DS/TEND1
FWE/ASEBRKAK/ASEBRK
PD20/IRQ4/TIC5WS/SCK4/POE8
PD21/IRQ5/TIC5VS/TXD4
PD25/TIOC4CS/DREQ1
PD26/TIOC3BS/DACK1
PD27/TIOC4AS/DACK0
PD28/TIOC3DS
PD29/TIOC3BS
PD30/TIOC3CS/IRQOUT
PD31/TIOC3AS/ADTRG
PB11/RXD2/CS6/CS2/CS0/IRQ0
PB12/TXD2/CS7/CS3/CS1/IRQ1
PE4/TIOC1A/RXD3
PE5/TIOC1B/TIOC3BS/TXD3
PE6/TIOC2A/TIOC3DS/SCK3
PE7/TIOC2B/RXD2/BS/UBCTRG
PE8/TIOC3A/SCK2
PE10/TIOC3C/TXD2
PA5/SCK1/SSCK/CS5
PA6/TCLKA/RASL
PA7/TCLKB/SCK3/CASL
PA8/TCLKC/TXD3/RDWR
PA9/TCLKD/RXD3/CKE
PA12/WRH/DQMLU/POE8
PA13/WRL/DQMLL
PA14/RD
PA23/TIC5W/POE0/IRQ1/AH/CKE
PA22/TIC5V/CASU/POE4/IRQ2/CASL
PA21/TIC5U/RASU/POE8/IRQ3/RASL
FWE/ASEBRKAK/ASEBRK
Mode SW
H-UDI
PE4/TIOC1A/RXD3
PE5/TIOC1B/TIOC3BS/TXD3
Serial
port
Switch by JP7
and JP8
GPIO,
Control
signal,
MTU2/2S,
Interrupt,
etc
Figure 2.2.1 SH7285 Block Diagram