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参数资料
| 型号： | BN87C51FC16 |
| 厂商： | INTEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 16 MHz, MICROCONTROLLER, PQCC44 |
| 封装： | PLASTIC, LCC-44 |
| 文件页数： | 6/18页 |
| 文件大小： | 254K |
| 代理商： | BN87C51FC16 |
AUTOMOTIVE 87C51FAFBFCFC-20
AC TESTING INPUT OUTPUT WAVEFORMS
270961 – 17
AC Inputs during testing are driven at VCCb05V for a Logic ‘‘1’’
and 045V for a Logic ‘‘0’’ Timing measurements are made at VIH
min for a Logic ‘‘1’’ and VIL max for a Logic ‘‘0’’
FLOAT WAVEFORMS
270961 – 18
For timing purposes a port pin is no longer floating when a
100 mV change from load voltage occurs and begins to float
when a 100 mV change from the loaded VOH VOL level occurs
IOL IOH t g20 mA
Table 3 EPROM Programming Modes
Mode
RST
PSEN
ALE
EA
P26
P27
P33
P36
P37
PROG
VPP
Program Code Data
H
L
1275V
L
H
Verify Code Data
H
L
H
L
H
Program Encryption
H
L
1275V
L
H
L
H
Array Address 0 – 3FH
Program Lock
Bit 1
H
L
1275V
H
Bits
Bit 2
H
L
1275V
H
L
Bit 3
H
L
1275V
H
L
H
L
Read Signature Byte
H
L
H
L
DEFINITION OF TERMS
(EPROM PROGRAMMING)
ADDRESS LINES
P10 – P17 P20 – P25 P34 –
P35 respectively for A0 – A13
DATA LINES
P00 – P07 for D0 – D7
CONTROL SIGNALS
RST PSEN P26 P27 P33
P36 P37
PROGRAM SIGNALS
ALEPROG EA VPP
PROGRAMMING THE EPROM
The part must be running with a 4 MHz to 6 MHz
oscillator The address of an EPROM location to be
programmed is applied to address lines while the
code byte to be programmed in that location is ap-
plied to data lines Control and program signals must
be held at the levels indicated in Table 3 Normally
EA VPP is held at logic high until just before ALE
PROG is to be pulsed The EA VPP is raised to VPP
ALEPROG is pulsed low and then EA VPP is re-
turned to a high (also refer to timing diagrams)
NOTE
Exceeding the VPP maximum for any amount of
time could damage the device permanently The
VPP source must be well regulated and free of
glitches
14
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