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參數(shù)資料
| 型號(hào)： | S87C652-5 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 80C51 8-bit microcontroller 8K/16K, 256 OTP, I2C |
| 中文描述： | 80C51的8位微控制器8K/16K，256檢察官辦公室和I2C |
| 文件頁(yè)數(shù)： | 17/24頁(yè) |
| 文件大?。?/td> | 195K |
| 代理商： | S87C652-5 |
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Philips Semiconductors
Product specification
87C652/87C654
80C51 8-bit microcontroller
8K/16K, 256 OTP, I
2
C
1999 Jul 23
17
EPROM CHARACTERISTICS
The 87C652/87C654 is programmed by using
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 87C652/87C654 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 87C652/87C654 manufactured by
Philips Components.
Table 4 shows the logic levels for reading the
signature byte, and for programming the
program memory, the encryption table, and
the lock bits. The circuit configuration and
waveforms for quick-pulse programming are
shown in Figures 12 and 13. Figure 14 shows
the circuit configuration for normal program
memory verification.
Quick-Pulse Programming
The setup for microcontroller quick-pulse
programming is shown in Figure 12. Note
that the 87C652/87C654 is running with a
4 to 6 MHz oscillator. The reason the
oscillator needs to be running is that the
device is executing internal address and
program data transfers.
The address of the EPROM location to be
programmed is applied to ports 1 and 2, as
shown in Figure 12. The code byte to be
programmed into that location is applied to
port 0. RST, PSEN and pins of ports 2 and 3
specified in Table 4 are held at the ‘Program
Code Data’ levels indicated in Table 4. The
ALE/PROG is pulsed low 25 times as shown
in Figure 13.
To program the encryption table, repeat the 25
pulse programming sequence for addresses 0
through 1FH, using the ‘Pgm Encryption Table’
levels. Do not forget that after the encryption
table is programmed, verification cycles will
produce only encrypted data.
To program the lock bits, repeat the 25 pulse
programming sequence using the ‘Pgm Lock
Bit’ levels. After one lock bit is programmed,
further programming of the code memory and
encryption table is disabled. However, the
other lock bit can still be programmed.
Note that the EA/V
PP
pin must not be allowed
to go above the maximum specified V
PP
level
for any amount of time. Even a narrow glitch
above that voltage can cause permanent
damage to the device. The V
PP
source
should be well regulated and free of glitches
and overshoot.
Program Verification
If lock bit 2 has not been programmed, the
on-chip program memory can be read out for
program verification. The address of the
program memory locations to be read is
applied to ports 1 and 2 as shown in
Figure 14. The other pins are held at the
‘Verify Code Data’ levels indicated in Table 4.
The contents of the address location will be
emitted on port 0. External pull-ups are
required on port 0 for this operation.
If the encryption table has been programmed,
the data presented at port 0 will be the
exclusive NOR of the program byte with one
of the encryption bytes. The user will have to
know the encryption table contents in order to
correctly decode the verification data. The
encryption table itself cannot be read out.
Reading the Signature Bytes
The signature bytes are read by the same
procedure as a normal verification of
locations 030H and 031H, except that P3.6
and P3.7 need to be pulled to a logic low. The
values are:
(030H) =
15H indicates manufactured by
Philips
(031H) =
99H
Program/Verify Algorithms
Any algorithm in agreement with the
conditions listed in Table 4, and which
satisfies the timing specifications, is suitable.
Table 4. EPROM Programming Modes
MODE
RST
PSEN
ALE/PROG
EA/V
PP
1
P2.7
P2.6
P3.7
P3.6
Read signature
1
0
1
0
0
0
0
Program code data
1
0
0*
V
PP
1
1
0
1
1
Verify code data
1
0
1
0
0
1
1
Pgm encryption table
1
0
0*
V
PP
V
PP
V
PP
1
0
1
0
Pgm lock bit 1
1
0
0*
1
1
1
1
Pgm lock bit 2
NOTES:
1. ‘0’ = Valid low for that pin, ‘1’ = valid high for that pin.
2. V
PP
= 12.75 V
±
0.25 V.
3. V
CC
= 5 V
±
10% during programming and verification.
*
ALE/PROG receives 25 programming pulses while V
PP
is held at 12.75 V. Each programming pulse is low for 100
μ
s (
±
10
μ
s) and high for a
minimum of 10
μ
s.
1
0
0*
1
1
0
0
Trademark phrase of Intel Corporation.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S87C652-5A44 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80C51 8-bit microcontroller 8K/16K, 256 OTP, I2C |
| S87C652-5B44 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:CMOS single-chip 8-bit microcontrollers |
| S87C652-5F40 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:CMOS single-chip 8-bit microcontrollers |
| S87C652-5K44 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| S87C652-5N40 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:CMOS single-chip 8-bit microcontrollers |
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