參數(shù)資料
型號： MC68HC11F1CFN3R2
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, EEPROM, 3 MHz, MICROCONTROLLER, PQCC68
封裝： PLASTIC, LCC-68
文件頁數(shù)： 111/174頁
文件大?。?/td> 981K
代理商： MC68HC11F1CFN3R2
MC68HC11F1
OPERATING MODES AND ON-CHIP MEMORY
MOTOROLA
TECHNICAL DATA
4-3
4.2.2 Memory Map
Figure 4-1 MC68HC11F1 Memory Map
4.2.2.1 RAM
The MC68HC11F1 microcontroller has 1024 bytes of fully static RAM that can be used
for storing instructions, variables, and temporary data during program execution. RAM
can be placed at any 4-Kbyte boundary in the 64 Kbyte address space by writing an
appropriate value to the INIT register.
RAM is initially located at $0000 in the memory map upon reset. Direct addressing
mode can access the first 256 locations of RAM using a one-byte address operand.
Direct mode accesses save program memory space and execution time.
The on-chip RAM is a fully static memory. RAM contents can be preserved during pe-
riods of processor inactivity by either of two methods, both of which reduce power con-
sumption.
NOTES:
1. RAM can be remapped to any 4-Kbyte boundary ($x000). "x" represents the value contained in
RAM[3:0] in the init register.
2. The register block can be remapped to any 4-Kbyte boundary ($y000). "y" represents the value contained in
reg[3:0] in the init register.
3. Special test mode vectors are externally addressed.
4. In special test mode the address locations $zD00–$zDFF are not externally addressable.
"z" represents the value of bits EE[3:0] in the config register.
5. EEPROM can be remapped to any 4-Kbyte boundary ($z000). "z" represents the value contained in
EE[3:0] in the config register.
zE00
EXPANDED
512 BYTES EEPROM 5
FFC0
FFFF
NORMAL MODE
INTERRUPT
VECTORS
1024 BYTES RAM 1
SINGLE
CHIP
BOOTSTRAP
SPECIAL
TEST
EXT
$0000
$1000
$FFFF
x000
y000
y05F
BF00
zFFF
BFC0
BFFF
SPECIAL MODE 3
INTERRUPT
VECTORS
EXT
x3FF
96-BYTE REGISTER BLOCK 2
$FE00
256 BYTES BOOTSTRAP ROM
zD00
256 BYTES RESERVED 4
(SPECIAL TEST MODE ONLY)
zDFF
EXT
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