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| 型号： | MC68HC11D3CFN1 |
| 厂商： | ABILIS SYSTEMS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 1 MHz, MICROCONTROLLER, PQCC44 |
| 封装： | PLASTIC, LCC-44 |
| 文件页数： | 63/124页 |
| 文件大小： | 6875K |
| 代理商： | MC68HC11D3CFN1 |
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OPERATING MODES AND ON-CHIP MEMORY
TECHNICAL DATA
4-9
NOTE
In expanded mode, ROM is located at $7000–$7FFF out of reset. In
all other modes, ROM is located at $F000–$FFFF.
4.2.2.2 INIT Register
The internal registers used to control the operation of the MCU can be relocated on 4K
boundaries within the memory space with the use of INIT. This 8-bit special-purpose
register can change the default locations of the RAM and control registers within the
MCU memory map. It can be written to only once within the first 64 E-clock cycles after
a reset, and then it becomes a read-only register.
RAM[3:0] — RAM Map Position
These four bits, which specify the upper hexadecimal digit of the RAM address, control
position of RAM in the memory map. RAM can be positioned at the beginning of any
4K page in the memory map. It is initialized to address $0040 out of reset. Refer to
REG[3:0] — 64-Byte Register Block Position
These four bits specify the upper hexadecimal digit of the address for the 64-byte block
of internal registers. The register block, positioned at the beginning of any 4K page in
the memory map, is initialized to address $0000 out of reset. Refer to Table 4-4.
INIT — RAM and I/O Mapping Register
$003D
Bit 7
654321
Bit 0
RAM3
RAM2
RAM1
RAM0
REG3
REG2
REG1
REG0
RESET:
00000001
Table 4-3 RAM Mapping
Table 4-4 Register Mapping
RAM[3:0]
Address
REG[3:0]
Address
0000
$0040–$00FF
0000
$0000–$003F
0001
$1040–$10FF
0001
$1000–$103F
0010
$2040–$20FF
0010
$2000–$203F
0011
$3040–$30FF
0011
$3000–$303F
0100
$4040–$40FF
0100
$4000–$403F
0101
$5040–$50FF
0101
$5000–$503F
0110
$6040–$60FF
0110
$6000–$603F
0111
$7040–$70FF
0111
$7000–$703F
1000
$8040–$80FF
1000
$8000–$803F
1001
$9040–$90FF
1001
$9000–$903F
1010
$A040–$A0FF
1010
$A000–$A03F
1011
$B040–$B0FF
1011
$B000–$B03F
1100
$C040–$C0FF
1100
$C000–$C03F
1101
$D040–$D0FF
1101
$D000–$D03F
1110
$E040–$E0FF
1110
$E000–$E03F
1111
$F040–$F0FF
1111
$F000–$F03F
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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相关代理商/技术参数 |
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| MC68HC11D3CFN2 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:Microcontrollers |
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