MC68HC705JD FREESCALE [Freescale Semiconductor, Inc], MC68HC705JD Datasheet - Page 41

• Manufacturer Part Number: MC68HC705JD
• Description: member of the low-cost
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

6.1.3.2 EPROM Erasing
6.1.4 Bootloader ROM
Rev. 2
Take the following steps to program a byte of EPROM:
The erased state of an EPROM bit is zero. Erase the EPROM by exposing it to 15
Ws/cm
ultraviolet light source 1 inch from the EPROM. Do not use a shortwave filter.
Addresses $0F01–$0FEF contain the bootloader ROM, which can copy and verify
the contents of an external EPROM to the on-chip EPROM. See
BOOTLOADER
1. Apply 16.5 V to the IRQ/V
2. Set the LATCH bit.
3. Write to any EPROM address.
4. Set the EPGM bit for a time t
5. Clear the LATCH bit.
Windowed packages must have the window covered during
programming and operation.
2
of ultraviolet light with a wavelength of 2537 angstroms. Position the
MODE.
Freescale Semiconductor, Inc.
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PP
MEMORY
EPGM
pin.
NOTE
to apply the programming voltage.
SECTION 8
6-5
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9