参数资料
型号: MC68HC705CL16
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 1.802 MHz, MICROCONTROLLER, PQFP100
封装: TQFP-100
文件页数: 15/145页
文件大小: 673K
代理商: MC68HC705CL16
June 11, 1997
GENERAL RELEASE SPECIFICATION
MC68HC05CL48
INSTRUCTION SET
MOTOROLA
REV 2.0
14-1
SECTION 14
INSTRUCTION SET
This section describes the addressing modes and instruction types.
14.1
ADDRESSING MODES
The CPU uses eight addressing modes for exibility in accessing data. The
addressing modes dene the manner in which the CPU nds the data required to
execute an instruction. The eight addressing modes are the following:
Inherent
Immediate
Direct
Extended
Indexed, No Offset
Indexed, 8-Bit Offset
Indexed, 16-Bit Offset
Relative
14.1.1 Inherent
Inherent instructions are those that have no operand, such as return from interrupt
(RTI) and stop (STOP). Some of the inherent instructions act on data in the CPU
registers, such as set carry ag (SEC) and increment accumulator (INCA). Inher-
ent instructions require no memory address and are one byte long.
14.1.2 Immediate
Immediate instructions are those that contain a value to be used in an operation
with the value in the accumulator or index register. Immediate instructions require
no memory address and are two bytes long. The opcode is the rst byte, and the
immediate data value is the second byte.
14.1.3 Direct
Direct instructions can access any of the rst 256 memory addresses with two
bytes. The rst byte is the opcode, and the second is the low byte of the operand
address. In direct addressing, the CPU automatically uses $00 as the high byte of
the operand address. BRSET and BRCLR are three-byte instructions that use
direct addressing to access the operand and relative addressing to specify a
branch destination.
相关PDF资料
PDF描述
MC68HC705MC4VDW 8-BIT, OTPROM, 3 MHz, MICROCONTROLLER, PDSO28
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