MC81F4x16
2. BLOCK DIAGRAM
SXin
Xin
RESET SXout Xout
VDD
VSS
EXT0/AN0/R02/EC0
AN1/R03/T0O/PWM0O/EXT1
SCK/R04/AN2/EXT2/EC1
SI/R05/AN3/EXT3/T1O/PWM1O
SO/R06/AN4/EXT4/EC2
8-bit Timer/Counter0
8-bit Timer/Counter1
8-bit Timer/Counter2
SIO
EXT2/AN2/SCK/R04/EC1
AN3/SI/R05/T1O/PWM1O/EXT3
RxD/R14
TxD/R15
UART
IIC
EXT4/AN4/SO/R06/EC2
AN5/R07/T2O/EXT5
SCL/R17
SDA/R16
Port I/O and EXTerrupt
Control
EXT7/AN6/R11/PWM2O
EXT8/BUZO/AN7/R12/PWM3O
EXT9/AN8/R13/PWM4O
High Speed PWM
AN0/R02/EC0/EXT0
AN1/R03/T0O/PWM0O/EXT1
AN2/R04/SCK/EC1/EXT2
AN3/R05/SI/T1O/PWM1O/EXT3
AN4/R06/SO/EC2/EXT4
AN5/R07/T2O/EXT5
AN6/R11/PWM2O/EXT7
AN7/R12/PWM3O/EXT8/BUZO
AN8/R13/PWM4O/EXT9
AN9/R20
Vref/R10/EXT6
8-bit Timer/Counter3
EXT8/AN7/PWM3O/R12/BUZO
BUZZER
LVR (POR)
Basic Timer/
Watchdog Timer
A/D Converter
Watch Timer
AN10/R25
AN11/R26
AN12/R27
AN13/R30
AN14/R31
Vref/R10/EXT6
Sxin/EXT10/R00
Sxout/EXT11/R01
EC0/EXT0/AN0/R02
G810 CPU
PWM0O/T0O/EXT1/AN1/R03
EC1/EXT2/SCK/AN2/R04
PWM1O/T1O/EXT3/SI/AN3/R05
EC2/EXT4/SO/AN4/R06
T2O/EXT5/AN5/R07
Port 0
R50 – R51
R52 – R53
Port 5
Port 4
EXT6/Vref/R10
PWM2O/EXT7/AN6/R11
BUZO/PWM3O/EXT8/AN7/R12
PWM4O/EXT9/AN8/R13
RxD/R14
R40 – R41
R42 – R43
Port 1
Port 2
16K x 8-bit
ROM
512 x 8-bit
RAM
R44 – R45
R46 – R47
TxD/R15
SDA/R16
SCL/R17
R30/AN13
R31/AN14
R32
R33/Xout
R34/Xin
AN9/R20
R21 – R24
AN10/R25
AN11/R26
AN12/R27
Port 3
R35/RESETB
Figure 2-1 System Block Diagram
October 19, 2009 Ver.1.35
13
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