MC68HC705P6A Datasheet, PDF (83/130 Pages) Motorola, Inc – HCMOS Microcontroller Unit

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/cm². UV lamps without shortwave filters should be used, and the
MC68HC705P6A — Rev. 2.0
MOTOROLA
EPROM
Advance Information
83