80C51 Datasheet, PDF (31/38 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless low voltage 2.7V.5.5V, low power, high speed 33 MHz

Philips Semiconductors
80C51 8-bit microcontroller family
4K/128 OTP/ROM/ROMless, low voltage (2.7V–5.5V),
low power, high speed (33 MHz)
Product specification
80C51/87C51/80C31
+5V
A0–A7
1
1
1
4–6MHz
P1
RST
P3.6
P3.7
XTAL2
XTAL1
V_SS
V_CC
P0
EA/V_PP
ALE/PROG
EPROM/OTP
PSEN
P2.7
P2.6
P2.0–P2.5
Figure 26. Programming Configuration
PGM DATA
+12.75V
5 PULSES TO GROUND
0
1
0
A8–A13
SU00873
5 PULSES
1
ALE/PROG:
0
1
2
3
4
5
SEE EXPLODED VIEW BELOW
1
ALE/PROG:
0
t_GLGH = 100µs±10µs
t_GHGL = 10µs MIN
1
Figure 27. PROG Waveform
SU00875
+5V
A0–A7
1
1
1
4–6MHz
P1
RST
P3.6
P3.7
XTAL2
XTAL1
V_SS
V_CC
P0
EA/V_PP
ALE/PROG
EPROM/OTP
PSEN
P2.7
P2.6
P2.0–P2.5
P3.4
Figure 28. Program Verification
PGM DATA
1
1
0
0 ENABLE
0
A8–A13
A14
SU00839A
2000 Jan 20
31