8749
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8-bit Microcontroller
Pinout
DIP40 +---\/---+ T0 | 1 40| Vcc XTAL1 | 2 39| T1 XTAL2 | 3 38| P27 *RESET | 4 37| P26 *SS | 5 36| P25 *INT | 6 35| P24 EA | 7 34| P17 *RD | 8 33| P16 *PSEN | 9 32| P15 *WR |10 31| P14 ALE |11 30| P13 DB0 |12 29| P12 DB1 |13 28| P11 DB2 |14 27| P10 DB3 |15 26| Vdd DB4 |16 25| PROG DB5 |17 24| P23 DB6 |18 23| P22 DB7 |19 22| P21 Vss |20 21| P20 +--------+
Frequency
DIP40
Set reader to FREQ, put black probe to GND, red probe to 2 and 3 to measure CPU clock
External links
Files
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P8749H Datasheet