參數(shù)資料
型號: P83C654EHB
廠商: NXP Semiconductors N.V.
英文描述: CMOS single-chip 8-bit microcontroller
中文描述: CMOS單芯片8位微控制器
文件頁數(shù): 80/88頁
文件大?。?/td> 497K
代理商: P83C654EHB
Philips Semiconductors
Product data
P83C654X2/P87C654X2
80C51 8-bit microcontroller family
16 kB OTP/ROM,
256B RAM, low voltage (2.7 to 5.5 V), low power, high speed
(30/33 MHz)
2004 Apr 20
80
Table 15.
EPROM Programming Modes
MODE
Read signature
Program code data
Verify code data
Pgm encryption table
Pgm security bit 1
Pgm security bit 2
Pgm security bit 3
Program to 6-clock mode
Verify 6-clock
4
Verify security bits
5
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.
4. Bit is output on P0.4 (1 = 12x, 0 = 6x).
5. Security bit one is output on P0.7.
Security bit two is output on P0.6.
Security bit three is output on P0.3.
*
ALE/PROG receives 5 programming pulses for code data (also for user array; 5 pulses for encryption or security bits) 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.
RST
1
1
1
1
1
1
1
1
1
1
PSEN
0
0
0
0
0
0
0
0
0
0
ALE/PROG
1
0*
1
0*
0*
0*
0*
0*
1
1
EA/V
PP
1
V
PP
1
V
PP
V
PP
V
PP
V
PP
V
PP
1
1
P2.7
0
1
0
1
1
1
0
0
e
e
P2.6
0
0
0
0
1
1
1
0
0
0
P3.7
0
1
1
1
1
0
0
1
0
1
P3.6
0
1
1
0
1
0
1
0
1
0
P3.3
X
X
X
X
X
X
X
0
1
X
Table 16.
Program Security Bits for EPROM Devices
PROGRAM LOCK BITS
1, 2
SB1
SB2
SB3
PROTECTION DESCRIPTION
1
U
U
U
No Program Security features enabled. (Code verify will still be encrypted by the Encryption Array if
programmed.)
2
P
U
U
MOVC instructions executed from external program memory are disabled from fetching code bytes
from internal memory, EA is sampled and latched on Reset, and further programming of the EPROM
is disabled.
3
P
P
U
Same as 2, also verify is disabled.
4
P
P
P
Same as 3, external execution is disabled. Internal data RAM is not accessible.
NOTES:
1. P – programmed. U – unprogrammed.
2. Any other combination of the security bits is not defined.
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