參數(shù)資料
型號: M68HC05M68H
廠商: Motorola, Inc.
英文描述: HCMOS Microcontroller Unit
中文描述: HCMOS微控制器
文件頁數(shù): 83/130頁
文件大小: 1541K
代理商: M68HC05M68H
MC68HC705P6A
Rev. 2.0
Advance Information
MOTOROLA
EPROM
83
Advance Information
MC68HC705P6A
Section 10. EPROM
10.1 Contents
10.2
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
10.3
EPROM Erasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
10.4
EPROM Programming Sequence. . . . . . . . . . . . . . . . . . . . . . .84
10.5
EPROM Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
10.6
EPROM Programming Register (EPROG). . . . . . . . . . . . . . . .84
10.7
EPROM Bootloader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
10.8
Programming from an External Memory Device. . . . . . . . . . . .87
10.2 Introduction
The user EPROM consists of 48 bytes of user page zero EPROM from
$0020 to $004F, 4608 bytes of user EPROM from $0100 to $12FF, the
two MOR reset values located at $1EFF and $1F00, and 16 bytes of user
vectors EPROM from $1FF0 to $1FFF. The bootloader ROM and
vectors are located from $1F01 to $1FEF.
10.3 EPROM Erasing
NOTE:
Only parts packaged in a windowed package may be erased. Others are
one-time programmable and may not be erased by UV exposure.
The MC68HC705P6A can be erased by exposure to a high-intensity
ultraviolet (UV) light with a wavelength of 2537 angstroms. The
recommended dose (UV intensity multiplied by exposure time) is
15 Ws/cm
2
. UV lamps without shortwave filters should be used, and the
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