參數(shù)資料
型號: MC68HC705J2CP
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: HCMOS MICROCONTROLLER UNIT
中文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP20
封裝: PLASTIC, DIP-20
文件頁數(shù): 23/82頁
文件大小: 327K
代理商: MC68HC705J2CP
MC68HC705J2
Rev. 2
CENTRAL PROCESSOR UNIT
MOTOROLA
4-1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SECTION 4
CENTRAL PROCESSOR UNIT
This section describes the registers, aithmetic/logic unit (ALU), and low-power modes
of the M68HC05 central processor unit (CPU).
4.1 CPU Registers
Figure 4-1
shows the five CPU registers. These are hard-wired registers within the
CPU and are not part of the memory map.
*Bit 11 of the program counter is fixed at 0 in MC68HC05J1 emulation mode.
Figure 4-1. Programming Model
7
0
A
ACCUMULATOR (A)
7
0
X
INDEX REGISTER (X)
15
6
5
0
0
0
0
0
0
0
0
0
1
1
SP
STACK POINTER (SP)
15
12
11*
8
7
0
0
0
0
0
PCH
PCL
PROGRAM COUNTER (PC)
7
5
4
0
1
1
1
H
I
N
Z
C
CONDITION CODE REGISTER (CCR)
CARRY/BORROW FLAG
ZERO PLAN
NEGATIVE FLAG
INTERRUPT MASK
HALF-CARRY FLAG
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