參數(shù)資料
型號: MC68HC11D3FB
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: ROM-based high-performance microcontrollers
中文描述: 基于ROM的高性能微控制器
文件頁數(shù): 37/124頁
文件大?。?/td> 840K
代理商: MC68HC11D3FB
OPERATING MODES AND ON-CHIP MEMORY
For More Information On This Product,
Go to: www.freescale.com
TECHNICAL DATA
4-3
4.2 Memory Map
The operating mode determines memory mapping and whether memory is addressed
on- or off-chip. Refer to
Figure 4-2
, which illustrates the memory maps for each of the
four modes of operation. Memory locations for on-chip resources are the same for both
expanded multiplexed and single-chip modes. 192-byte RAM is mapped to $0040 af-
ter reset. It can be placed at any other 4K boundary ($x040) by writing an appropriate
value to the INIT register. The 64-byte register block is mapped to $0000 after reset
and can also be placed at any 4K boundary ($x000) by writing an appropriate value to
the INIT register. Refer to
Table 4-1
, which details the MCU register and control bit
assignments.
Figure 4-2 MC68HC11D3 Memory Map
SINGLE
CHIP
BOOTSTRAP
SPECIAL
TEST
EXPANDED
NORMAL
MODES
INTERRUPT
VECTORS
192 BYTES STATIC RAM
64-BYTE REGISTER BLOCK
$0000
$0040
$7000
$F000
$FFFF
SPECIAL MODES
INTERRUPT
VECTORS
4 KBYTES ROM
4 KBYTES ROM
BOOT
ROM
D3 MEM MAP
FFC0
FFFF
BFC0
BFFF
FFFF
BF00
BFFF
7000
7FFF
0040
00FF
0000
003F
EXT
EXT
F000
EXT
F
Freescale Semiconductor, Inc.
n
.
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