参数资料
型号: MC68HC05SR3FB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQFP44
封装: QFP-44
文件页数: 51/96页
文件大小: 3143K
代理商: MC68HC05SR3FB
MC68HC05SR3
Freescale
8-1
CPU CORE AND INSTRUCTION SET
8
CPU CORE AND INSTRUCTION SET
This section provides a description of the CPU core registers, the instruction set and the
addressing modes of the MC68HC05SR3.
8.1
Registers
The MCU contains five registers, as shown in the programming model of Figure 8-1. The interrupt
stacking order is shown in Figure 8-2.
8.1.1
Accumulator (A)
The accumulator is a general purpose 8-bit register used to hold operands and results of
arithmetic calculations or data manipulations.
Figure 8-1 Programming model
Accumulator
Index register
Program counter
Stack pointer
Condition code register
Carry / borrow
Zero
Negative
Interrupt mask
Half carry
70
15
7
0
15
7
0
0 0 0 0 0 0 0 1 1
70
1 1 1 H I N Z C
TPG
53
05SR3.Book Page 1 Thursday, August 4, 2005 1:08 PM
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