80C550 Datasheet, PDF (23/28 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless, 8 channel 8 bit A/D, watchdog timer

Philips Semiconductors
80C51 8-bit microcontroller family
4K/128 OTP/ROM/ROMless, 8 channel 8 bit A/D, watchdog timer
Product specification
80C550/83C550/87C550
A0–A7
1
1
1
4–6MHz
1
ALE/PROG:
0
1
ALE/PROG:
0
A0–A7
1
1
1
4–6MHz
P3
RST
P1.0
P1.1
XTAL2
XTAL1
AV_SS
V_SS
+5V
AV_CC
V_CC
P0
87C550
EA/V_PP
ALE/PROG
PSEN
P2.7
P2.6
P2.0–P2.4
PGM DATA
+12.75V
25 100µs PULSES TO GROUND
0
1
0
A8–A11
Figure 17. Programming Configuration
SU00205
25 PULSES
10µs MIN
100µs+10
Figure 18. PROG Waveform
P3
RST
P1.0
P1.1
XTAL2
XTAL1
AV_SS
V_SS
+5V
AV_CC
V_CC
P0
87C550
EA/V_PP
ALE/PROG
PSEN
P2.7
P2.6
P2.0–P2.4
Figure 19. Program Verification
PGM Data
1
1
0
0 ENABLE
0
A8–A11
SU00206
SU00018
1998 May 01
23