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參數(shù)資料
| 型號： | MD80C51 |
| 廠商： | Intel Corp. |
| 英文描述： | CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER |
| 中文描述： | CHMOS單片8位微控制器 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 229K |
| 代理商： | MD80C51 |
AUTOMOTIVE 80C31BH/80C51BH/87C51
EPROM CHARACTERISTICS
(EPROM Only)
The 87C51 is programmed by a modified Quick-
Pulse Programming algorithm. It differs from older
methods in the value used for V
PP
(Programming
Supply Voltage) and in the width and number of the
ALE/PROG pulses.
The 87C51 contains two signature bytes that can be
read and used by an EPROM programming system
to identify the device. The signature bytes identify
the device as an 87C51 manufactured by Intel.
Table 3 shows the logic levels for reading the signa-
ture byte, and for programming the Program Memo-
ry, the Encryption Table, and the Lock Bits. The cir-
cuit configuration and waveforms for Quick-Pulse
Programming are shown in Figures 11 and 12. Fig-
ure 13 shows the circuit configuration for normal
Program Memory verification.
Table 3. EPROM Programming Modes
MODE
RST
PSEN
ALE/
PROG
EA/
V
PP
P2.7
P2.6
P3.7
P3.6
Read Signature
1
0
1
1
0
0
0
0
Program Code Data
1
0
0
*
V
PP
1
0
1
1
Verify Code Data
1
0
1
1
0
0
1
1
Pgm Encryption Table
1
0
0
*
V
PP
1
0
1
0
Pgm Lock Bit 1
1
0
0
*
V
PP
1
1
1
1
Pgm Lock Bit 2
1
0
0
*
V
PP
1
1
0
0
NOTES:
‘‘1’’
e
Valid high for that pin
‘‘0’’
e
Valid low for that pin
V
PP
e
12.75V
g
0.25V
V
CC
e
5V
g
20%
during programming and verification
*
ALE/PROG receives 25 programming pulses while V
PP
is held at 12.75V. Each programming pulse is low for 100
m
s
(
g
10
m
s) and high for a minimum of 10
m
s.
270419–19
Figure 11. Programming Configuration
13
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MD80C51BH | 制造商:ROCHESTER 制造商全稱:ROCHESTER 功能描述:CMOS SINGLE - CHIP 8-BIT MICROCOMPUTER 64K program Memory Space |
| MD80C51FB | 制造商:Rochester Electronics LLC 功能描述: |
| MD80C86 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS 16-Bit Microprocessor |
| MD80C862 | 制造商:Intel 功能描述:PROCESSOR:MICRO-PROCESSOR |
| MD80C86-2 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS 16-Bit Microprocessor |
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