mc68hc908jb8 Freescale Semiconductor, Inc, mc68hc908jb8 Datasheet - Page 278
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mc68hc908jb8
Manufacturer Part Number
mc68hc908jb8
Description
M68hc08 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908JB8.pdf
(286 pages)
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MC68HC08JT8
B.2 Introduction
B.3 MCU Block Diagram
B.4 Memory Map
Technical Data
278
Memory ($DC00–$FBFF)
User vectors ($FFF0–$FFFF)
Registers at $FE08 and $FF09
Bit 4 at CONFIG ($001F)
Monitor ROM
($FC00–$FDFF and $FE10–$FFDF)
Low voltage inhibit module
Universal Serial Bus (USB) module
On-chip 3.3V regulator
Operating voltage
Operating frequency
Table B-1. Summary of MC68HC08JT8 and MC68HC908JB8 Differences
This section introduces the MC68HC08JT8, a low-voltage ROM part
version to the MC68HC908JB8. The entire data book apply to this ROM
device, with exceptions outlined in this appendix.
Figure B-1
The MC68HC08JT8 has 8,192 bytes of user ROM from $DC00 to
$FBFF, and 16 bytes of user ROM vectors from $FFF0 to $FFFF. On the
MC68HC908JB8, these memory locations are FLASH memory.
Figure B-2
shows the block diagram of the MC68HC08JT8.
shows the memory map of the MC68HC08JT8.
8,192 bytes ROM
16 bytes ROM
Not used;
locations are reserved
Not used;
bit is reserved.
$FC00–$FDFF: Not used.
$FE10–$FFDF: Used for
testing purposes only.
Not available (disabled)
Not available. User should set
the SUSPND bit to logic 1 to
reduce power consumption.
Not available (disabled)
2.0 to 3.6V
f
f
OPMAX
OPMAX
MC68HC08JT8
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
MC68HC08JT8
= 2.5MHz at 2V
= 3MHz at 3V
8,192 bytes FLASH
16 bytes FLASH
FLASH related registers.
$FE08 — FLCR
$FF09 — FLBPR
LVID: low-voltage inhibit
disable bit
Used for testing and FLASH
programming/erasing.
Available
Available
Available
4.0 to 5.5V
3MHz
MC68HC908JB8
Freescale Semiconductor
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