MC68EC000EI20 Freescale Semiconductor, MC68EC000EI20 Datasheet - Page 125

• 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: -

ASL, ASR
Operation:
Assembler
Syntax:
Attributes:
Description: Arithmetically shifts the bits of the operand in the direction (L or R) specified.
MOTOROLA
The carry bit receives the last bit shifted out of the operand. The shift count for the
shifting of a register may be specified in two different ways:
The size of the operation can be specified as byte, word, or long. An operand in mem-
ory can be shifted one bit only, and the operand size is restricted to a word.
For ASL, the operand is shifted left; the number of positions shifted is the shift count.
Bits shifted out of the high-order bit go to both the carry and the extend bits; zeros are
shifted into the low-order bit. The overflow bit indicates if any sign changes occur dur-
ing the shift.
1. Immediate—The shift count is specified in the instruction (shift range, 1 – 8).
2. Register—The shift count is the value in the data register specified in instruction
modulo 64.
ASL:
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
Destination Shifted By Count
ASd Dx,Dy
ASd # < data > ,Dy
ASd < ea >
where d is direction, L or R
Size = (Byte, Word, Long)
C
X
Arithmetic Shift
(M68000 Family)
.
Destination
OPERAND
ASL, ASR
Integer Instructions
O
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