MC68EC000EI20 Freescale Semiconductor, MC68EC000EI20 Datasheet - Page 235
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MC68EC000EI20
Manufacturer Part Number
MC68EC000EI20
Description
IC MPU 32BIT 20MHZ 68-PLCC
Manufacturer
Freescale Semiconductor
Specifications of MC68EC000EI20
Processor Type
M680x0 32-Bit
Speed
20MHz
Voltage
3.3V, 5V
Mounting Type
Surface Mount
Package / Case
68-PLCC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
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MOVEP
Operation:
Assembler
Syntax:
Attributes:
Description: Moves data between a data register and alternate bytes within the address
MOTOROLA
space starting at the location specified and incrementing by two. The high-order byte
of the data register is transferred first, and the low-order byte is transferred last. The
memory address is specified in the address register indirect plus 16-bit displacement
addressing mode. This instruction was originally designed for interfacing 8-bit
peripherals on a 16-bit data bus, such as the MC68000 bus. Although supported by the
MC68020, MC68030, and MC68040, this instruction is not useful for those processors
with an external 32-bit bus.
Example: Long transfer to/from an even address.
31
HIGH ORDER
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
Source
MOVEP Dx,(d16,Ay)
MOVEP (d16,Ay),Dx
Size = (Word, Long)
24
Byte Organization in Register
23
15
Destination
Move Peripheral Data
HIGH ORDER
LOW ORDER
MID LOWER
MID UPPER
MID UPPER
(Low Address at Top)
Byte Organization in
(M68000 Family)
16-Bit Memory
16
8
15
7
MID LOWER
8
0
7
LOW ORDER
Integer Instructions
MOVEP
0
4-131
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