...3, 5, 9, 11, 13 2, 4, 6, 8, 10, 12 7 14 1A to 6A 1Y to 6Y GND VCC SYMBOL data inputs data outputs ground (0 V) positive supply voltage
74...24.9 25 to 54.9 55 to 129.9 130 to 199.9 200 to 349.9 350 to 600 Note 1. All values given are typica...
...3 5 MHz MHz MHz MHz to to to to 12 16 12 24 MHz MHz MHz MHz VCC VCC VCC VCC
e e e e
-1 X X X X
-2 X X X X
-24 X X X X
X X X X
5V 5V 5V 5V
g20% g20% g20% g20%
272335 - 1
Figure 1 87C51 BH Block Diagram
2
87C51 80C5...
.... They support both 6-clock and 12-clock operation. The 8xC31X2/51X2 and 8xC32X2/52X2/54X2/58X2 contain 128 byte RAM and 256 byte RAM respec...24
2
Philips Semiconductors
Preliminary data
80C51 8-bit microcontroller family
4K/8K/1...
Description
80C51 8-bit microcontroller family 4K/8K/16K/32K ROM/OTP 128B/256B RAM low voltage 2.7 to 5.5 V, low power, high speed 30/33 MHz 80C51 8-bit microcontroller family 4K/8K/16K/32K ROM/OTP 128B/256B RAM low voltage 2.7 to 5.5 V low power high speed 30/33 MHz
80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless low voltage 2.7V.5.5V low power high speed 33 MHz 80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless low voltage 2.7V.5.5V, low power, high speed 33 MHz
...
PQFP/TQFP
PLCC
0580D-A-12/97
4-169
Block Diagram
P0.0 - P0.7
P2.0 - P2.7
VCC PORT 0 DRIVERS GND PORT 2 DRIVERS
RA...24 oscillator periods) are required to recognize a 1-to-0 transition, the maximum count rate is 1/24...