參數(shù)資料
型號: HC805P18GRS
英文描述: 68HC805P18 Technical Data
中文描述: 68HC805P18技術(shù)數(shù)據(jù)
文件頁數(shù): 40/111頁
文件大?。?/td> 748K
代理商: HC805P18GRS
GENERAL RELEASE SPECIFICATION
MOTOROLA
6-4
OPERATING MODES
MC68HC805P18
Rev. 1.0
8
2
3
4
5
6
7
8
9
10
11
12
13
14
A
16
17
18
19
20
Bulk Erase/Program Verify
To use the bootloader circuit to bulk erase, program, and verify the user
EEPROM, follow this sequence:
1.
Close RESET switch so RESET is low upon power up.
2.
Open PTC4 switch so PTC4 remains high during reset sequence.
3.
Make sure code to be loaded into user EEPROM is in the external
EPROM (shown as 27C128).
4.
Apply 12 V power to IRQ.
5.
Release RESET.
6.
Programming LED will be on during bulk erase and programming. (The
code in the 27C128 will be loaded into the user EEPROM and MOR.)
7.
When programming is finished, the programming LED will turn off.
8.
When the verify is finished, verify LED will turn on.
9.
Close RESET switch.
10.
Remove 12 V from IRQ, then remove power.
NOTE
Bootloader mode is the only mode in which the user can program the
8K user EEPROM and MOR. The 128-byte EEPROM can be
programmed in user mode.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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