80c51: Difference between revisions
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Revision as of 11:56, 7 February 2013
| Number | notes |
|---|---|
| 80C31 | ROMless |
| 80C51 | 4k x 8 ROM |
| 83C751 | 2k x 8 ROM |
| 87C51 | 4k x 8 EPROM |
| 87C751 | 2k x 8 EPROM |
8-bit Microcontroller
Pinout
DIP40
+---\/---+
P1.0 | 1 40| Vdd
P1.1 | 2 39| P0.0/AD0
P1.2 | 3 38| P0.1/AD1
P1.3 | 4 37| P0.2/AD2
P1.4 | 5 36| P0.3/AD3
P1.5 | 6 35| P0.4/AD4
P1.6 | 7 34| P0.5/AD5
P1.7 | 8 33| P0.6/AD6
RST | 9 32| P0.7/AD7
RxD/P3.0 |10 31| *EA/Vpp
TxD/P3.1 |11 30| ALE/*PROG
*INT0/P3.2 |12 29| *PSEN
*INT1/P3.3 |13 28| P2.7/A15
T0/P3.4 |14 27| P2.6/A14
T1/P3.5 |15 26| P2.5/A13
*WR/P3.6 |16 25| P2.4/A12
*RD/P3.7 |17 24| P2.3/A11
XTAL2 |18 23| P2.2/A10
XTAL1 |19 22| P2.1/A9
Vss |20 21| P2.0/A8
+--------+
Frequency
DIP40
Set reader to FREQ, put black probe to GND, red probe to 18 and 19 to measure CPU clock
External links
80C51 page on Wikipedia
80C51 page on CPU-World
Files
-
80C51 Datasheet
-
87C750 Datasheet
