參數(shù)資料
型號: HC05K3GRS
英文描述: 68HC05K3 General Release Specification
中文描述: 68HC05K3一般版本規(guī)范
文件頁數(shù): 35/132頁
文件大?。?/td> 1188K
代理商: HC05K3GRS
MC68HC05K3 — Revision 4.0
Technical Data
MOTOROLA
Central Processor Unit (CPU) Core
35
Technical Data — MC68HC05K3
Section 3. Central Processor Unit (CPU) Core
3.1 Contents
3.2
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
3.3
3.3.1
3.3.2
Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Stack Pointer (SP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Program Counter (PC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
3.2 Introduction
The MC68HC05K3 has a 1024-byte memory map. Therefore, it uses
only the lower 10 bits of the address bus. In the following discussion, the
upper six bits of the address bus can be ignored. Also, by using a mask
option, the STOP instruction can be converted from acting as the normal
STOP instruction. The stack area also is reduced to 32 bytes due to the
limited amount of RAM. Therefore, the stack pointer is reduced to only
five bits, only decrements down to $00E0, and then wraps around to
$00FF. All other instructions and registers behave as described in
M6805 HMOS/M146805 CMOS Family User’s Manual, Motorola
document order number M6805UM/AD3.
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