68705

8-bit Microcomputer Unit

Family table

Model	technology	ROM type
6805	HMOS	MaskROM
68705	HMOS	EPROM/OTPROM
146805	CMOS	MaskROM
1468705	CMOS	EPROM/OTPROM
68HC05	high speed CMOS	MaskROM
68HC705	high speed CMOS	EPROM/OTPROM
68HC805	high speed CMOS	EEPROM

Pinout

        DIP20-300mil
         +---\/---+
    OSC1 | 1    20| *RESET
    OSC2 | 2    19| *IRQ/Vpp
     PB5 | 3    18| PA0
     PB4 | 4    17| PA1
     PB3 | 5    16| PA2
     PB2 | 6    15| PA3
     PB1 | 7    14| PA4
     PB0 | 8    13| PA5
     Vdd | 9    12| PA6
     Vss |10    11| PA7
         +--------+


        DIP28-600mil
         +---\/---+
     Vss | 1    28| *RESET
    *INT | 2    27| PA7
     Vcc | 3    26| PA6
   EXTAL | 4    25| PA5
    XTAL | 5    24| PA4
     Vpp | 6    23| PA3
   TIMER | 7    22| PA2
     PC0 | 8    21| PA1
     PC1 | 9    20| PA0
     PC2 |10    19| PB7
     PC3 |11    18| PB6
     PB0 |12    17| PB5
     PB1 |13    16| PB4
     PB2 |14    15| PB3
         +--------+


        DIP40-600mil
         +---\/---+
  *RESET | 1    40| Vdd
    *IRQ | 2    39| OSC1
     Vpp | 3    38| OSC2
     PA7 | 4    37| TCAP
     PA6 | 5    36| PD7
     PA5 | 6    35| TCMP
     PA4 | 7    34| PD5/*SS
     PA3 | 8    33| PD4/SCK
     PA2 | 9    32| PD3/MOSI
     PA1 |10    31| PD2/MISO
     PA0 |11    30| PD1/TDO
     PB0 |12    29| PD0/RDI
     PB1 |13    28| PC0
     PB2 |14    27| PC1
     PB3 |15    26| PC2
     PB4 |16    25| PC3
     PB5 |17    24| PC4
     PB6 |18    23| PC5
     PB7 |19    22| PC6
     Vss |20    21| PC7
         +--------+

Frequency

DIP20
Set reader to FREQ, put black probe to GND, red probe to 1 and 2 to measure CPU clock

DIP28
Set reader to FREQ, put black probe to GND, red probe to 4 and 5 to measure CPU clock

DIP28
Set reader to FREQ, put black probe to GND, red probe to 38 and 39 to measure CPU clock

External links

68705 page on CPU-World

Files

• 

  68705 Datasheet

• 

  68HC705 Datasheet

• 

  68HC705C Datasheet