87C51 Intel Corporation, 87C51 Datasheet - Page 20

• Manufacturer Part Number: 87C51
• Description: CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
• Manufacturer: Intel Corporation

87C51 80C51BH 80C31BH
EPROM PROGRAMMING EPROM AND ROM VERIFICATION
CHARACTERISTICS
(T
EPROM PROGRAMMING EPROM AND ROM VERIFICATION WAVEFORMS
20
A
For programming conditions see Figure 10
5 pulses for the EPROM array 25 pulses for the encryption table and lock bits
e
V
I
1 TCLCL
TAVGL
TGHAX
TDVGL
TGHDX
TEHSH
TSHGL
TGHSL
TGLGH
TAVQV
TELQV
TEHQZ
TGHGL
PP
Symbol
PP
21 C to 27 C V
CC
Programming Supply Voltage
Programming Supply Current
Oscillator Frequency
Address Setup to PROG Low
Address Hold After PROG
Data Setup to PROG Low
Data Hold After PROG
P2 7 (ENABLE) High to V
V
V
PROG Width
Address to Data Valid
ENABLE Low to Data Valid
Data Float After ENABLE
PROG High to PROG Low
PP
PP
e
Setup to PROG Low
Hold After PROG
5V
Parameter
g
10% V
SS
e
PP
0V)
48TCLCL
48TCLCL
48TCLCL
48TCLCL
48TCLCL
12 5
Min
10
10
90
10
4
0
48TCLCL
48TCLCL
48TCLCL
Max
13 0
110
75
6
272335 –23
Units
MHz
mA
V
s
s
s
s