MDT10P20BC Datasheet, PDF (15/16 Pages) Micon Design Technology Corporation – 8-bit micro-controller

12. Block Diagram
MDT10P20(BC)
Stack Two Levels
11 bits
EPROM
2048 14
11 bits
14 bits
Program Counters
Instruction
Register
OSC1 OSC2
MCLR
Oscillator Circuit
Instruction
Decoder
RAM
72*8
Port A
Port
PA0~PA3
4 bits
Special Register
D0~D7
Control Circuit
Port B
Port
PB0~PB7
8 bits
Power on Reset
Power Down Reset
Working Register
ALU
Data 8-bit
Status Register
8-bit Timer/Counter
Prescale
RTCC
WDT/OST
Timer
Port C
Port
PC0~PC7
8 bits
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P. 14
2005/6 VER 1.3