參數(shù)資料
型號： 68HC705PL4
廠商： Motorola, Inc.
英文描述： 8-Bit Microcontroller Units (MCU).(8位微控制器)
中文描述： 8位微控制器單元（MCU）。（8位微控制器）
文件頁數(shù)： 93/98頁
文件大小： 1019K
代理商： 68HC705PL4
April 30, 1998
GENERAL RELEASE SPECIFICATION
MC68HC05PL4
REV 2.0
MOTOROLA
A-3
PGM – EPROM ProGraM command
0 =
Programming power is switched OFF from EPROM array.
1 =
Programming power is switched ON to EPROM array. If ELAT
≠
1,
then PGM = 0.
A.4.2 Programming Sequence
The EPROM programming sequence is:
1.
Set the ELAT bit
2.
Write the data to the address to be programmed
3.
Set the PGM bit
4.
Delay for a time t
PGMR
5.
Clear the PGM bit
6.
Clear the ELAT bit
The last two steps must be performed with separate CPU writes.
CAUTION
It is important to remember that an external programming voltage
must be applied to the V
PP
pin while programming, but it should be
equal to V
DD
during normal operations.
Figure A-2
shows the flow required to successfully program the EPROM.
A.5 EPROM PROGRAMMING SPECIFICATIONS
Table A-2. EPROM Programming Electrical Characteristics
(V
DD
= 4V
±
10%, V
SS
= 0 Vdc, T
A
= 0
°
C to +70
°
C, unless otherwise noted)
Characteristic
Symbol
Min
Typ
Max
Unit
Programming Voltage
V
PP
—
12.5
—
V
Programming Current
I
PP
—
5
10
mA
Programming Time per byte
t
EPGM
—
1
—
ms
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68HC705SJ7 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification
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