參數(shù)資料
型號: MC705J1ACDWE
廠商: Freescale Semiconductor
文件頁數(shù): 106/162頁
文件大?。?/td> 0K
描述: IC MCU 8BIT 1.2K RAM 20-SOIC
標準包裝: 38
系列: HC05
核心處理器: HC05
芯體尺寸: 8-位
速度: 4MHz
外圍設備: POR,WDT
輸入/輸出數(shù): 14
程序存儲器容量: 1.2KB(1.2K x 8)
程序存儲器類型: OTP
RAM 容量: 64 x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
振蕩器型: 內部
工作溫度: -40°C ~ 85°C
封裝/外殼: 20-SOIC(0.295",7.50mm 寬)
包裝: 管件
Technical Data
MC68HC705J1A — Rev. 4.0
Central Processor Unit (CPU)
Central Processor Unit (CPU)
3.5 CPU Registers
The M68HC05 CPU contains five registers that control and monitor
microcontroller unit (MCU) operation:
Accumulator
Index register
Stack pointer
Program counter
Condition code register
CPU registers are not memory mapped.
3.5.1 Accumulator
The accumulator (A) is a general-purpose 8-bit register. The CPU uses
the accumulator to hold operands and results of ALU operations.
3.5.2 Index Register
In the indexed addressing (X) modes, the CPU uses the byte in the index
register to determine the conditional address of the operand. The index
register also can serve as a temporary storage location or a counter.
Bit 7
6
54
32
1
Bit 0
Read:
Write:
Reset:
Unaffected by reset
Figure 3-2. Accumulator (A)
Bit 7
6
54
32
1
Bit 0
Read:
Write:
Reset:
Unaffected by reset
Figure 3-3. Index Register (X)
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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