參數(shù)資料
型號: MC68HC05X4CDWR2
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.2 MHz, MICROCONTROLLER, PDSO28
封裝: PLASTIC, SOIC-28
文件頁數(shù): 91/168頁
文件大?。?/td> 656K
代理商: MC68HC05X4CDWR2
CPU
CPU Registers
MC68HC05X4 Rev 1.0
MOTOROLA
CPU
29
Index Register
In the indexed addressing modes, the CPU uses the byte in the index
register to determine the conditional address of the operand.
The 8-bit index register can also serve as a temporary data storage
location.
Stack Pointer
The stack pointer is a 16-bit register that contains the address of the next
location on the stack. During a reset or after the reset stack pointer
(RSP) instruction, the stack pointer is preset to $00FF. The address in
the stack pointer decrements as data is pushed onto the stack and
increments as data is pulled from the stack.
The ten most significant bits of the stack pointer are permanently fixed
at 000000011, so the stack pointer produces addresses from $00C0 to
$00FF. If subroutines and interrupts use more than 64 stack locations,
the stack pointer wraps around to address $00FF and begins writing
over the previously stored data. A subroutine uses two stack locations.
An interrupt uses five locations.
Bit 7
654321
Bit 0
Reset:
Unaffected by reset
Figure 2. Accumulator
Bit 7
654321
Bit 0
Reset:
Unaffected by reset
Figure 3. Index Register
Bit 15 14
13
12
11
10
987654321
Bit 0
0000000011
Reset
0000000011111111
Figure 4. Stack Pointer
3-cpu
相關(guān)PDF資料
PDF描述
MC68HC708KH12FU 8-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PQFP64
MC68HC708LN56PV 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP144
MC68HC08LN56PV 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP144
MC68HC711E20CFNE 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PQCC52
MC68HC711EA9CFN2 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PQCC52
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC05X4DW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC08AB16A 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC08AB16AD 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC08AZ0 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Advance Information
MC68HC08AZ0CFU 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Advance Information