mc68hc05l28 Freescale Semiconductor, Inc, mc68hc05l28 Datasheet - Page 135

• Manufacturer Part Number: mc68hc05l28
• Description: ?exible General-purpose Microcomputer
• Manufacturer: Freescale Semiconductor, Inc

This appendix summarises the differences between the MC68HC05L28 and the MC68HC705L28.
The same information can also be found in appropriate sections of the book.
The MC68HC705L28 is an EPROM version of the MC68HC05L28. The 8176 bytes of user ROM
in the MC68HC05L28 are replaced by 8128 bytes of user EPROM.
A.1
•
•
•
A.2
The MC68HC705L28 also has two modes of operation – single chip and EPROM/RAM bootloader.
Table A-1 shows the conditions required to enter each mode on the rising edge of RESET.
MC68HC05L28
8128 bytes of user EPROM
RAM bootloader is different to the RAM bootloader in the MC68HC05L28
EPROM bootloader mode
Features
Modes of operation
V
IRQ0/VPP
SS
Table A-1 MC68HC705L28 operating mode entry conditions
V
V
V
V
TST
TST
TST
TST
to V
DD
PB2
0
0
1
1
x
MC68HC705L28
PB3
x
0
1
0
1
MC68HC705L28
PB6
V
V
V
V
x
DD
DD
DD
DD
A
Single chip
EPROM bootloader
RAM bootloader
Mode
Verify only
Program/verify
Jump to RAM ($81)
Load/execute RAM
MOTOROLA
TPG
A-1
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