MC68020EH25E Freescale Semiconductor, MC68020EH25E Datasheet - Page 180
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MC68020EH25E
Manufacturer Part Number
MC68020EH25E
Description
IC MPU 32BIT 33MHZ 132-PQFP
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68020EH16E.pdf
(306 pages)
Specifications of MC68020EH25E
Processor Type
M680x0 32-Bit
Speed
25MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
132-MQFP, 132-PQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68020EH25E
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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7.3.7 Condition CIR
The main processor initiates a conditional category instruction by writing the condition
selector to bits 5–0 of the 16-bit condition CIR. Bits 15–6 are undefined and reserved by
Motorola. The offset from the base address of the CIR set for the condition CIR is $0E.
Figure 7-20 shows the format of the condition CIR.
7.3.8 Operand CIR
When the coprocessor requests the transfer of an operand, the main processor performs
the transfer by reading from or writing to the 32-bit operand CIR. The offset from the base
address of the CIR set for the operand CIR is $10.
The MC68020/EC020 aligns all operands transferred to and from the operand CIR to the
most significant byte of this CIR. The processor performs a sequence of long-word
transfers to read or write any operand larger than four bytes. If the operand size is not a
multiple of four bytes, the portion remaining after the initial long-word transfer is aligned to
the most significant byte of the operand CIR. Figure 7-21 shows the operand alignment
used by the MC68020/EC020 when accessing the operand CIR.
MOTOROLA
31
BYTE OPERAND
15
TEN-
Figure 7-21. Operand Alignment for Operand CIR Accesses
BYTE-
WORD OPERAND
OPERAND
24
(UNDEFINED, RESERVED)
Freescale Semiconductor, Inc.
23
For More Information On This Product,
Figure 7-20. Condition CIR Format
THREE-BYTE OPERAND
Go to: www.freescale.com
M68020 USER’S MANUAL
LONG-WORD OPERAND
16
15
NO TRANSFER
6
5
CONDITION SELECTOR
NO TRANSFER
NO TRANSFER
8
7
NO TRANSFER
0
7- 27
0
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