參數(shù)資料
型號： HC05JJ6GRS
英文描述： 68HC05JJ6 and 68HC05JP6 General Release Specification
中文描述： 68HC05JJ6和68HC05JP6總發(fā)行規(guī)格
文件頁數(shù)： 97/106頁
文件大小： 1366K
代理商： HC05JJ6GRS
July 16, 1999
GENERAL RELEASE SPECIFICATION
MC68HC05J5A
REV 2.1
MOTOROLA
B-5
B.5.2 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
operations.
DD
during normal
Figure B-2
shows the flow required to successfully program the EPROM.
Figure B-2. EPROM Programming Sequence
START
ELAT=1
Write EPROM byte
PGM=1
Wait 1ms
PGM=0
ELAT=0
Write
additional
byte
N
Y
END
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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