MC68020 Motorola, MC68020 Datasheet - Page 246

• Manufacturer Part Number: MC68020
• Description: (MC68020 / MC68EC020) MICROPROCESSORS USERS MANUAL
• Manufacturer: Motorola

8.2.10 Binary-Coded Decimal Operations
The binary-coded decimal operations table indicates the number of clock periods needed
for the processor to perform the specified operation using the given addressing modes,
with complete execution times given. No additional tables are needed to calculate total
effective execution time for these instructions. The total number of clock cycles is outside
the parentheses; the number of read, prefetch, and write cycles is given inside the
parentheses as (r/p/w). These cycles are included in the total clock cycle number.
8-32
ABCD
ABCD
SBCD
SBCD
ADDX
ADDX
SUBX
SUBX
CMPM
PACK
PACK
UNPK
UNPK
Instruction
Dn,Dn
–(An),–(An)
Dn,Dn
–(An),–(An)
Dn,Dn
–(An),–(An)
Dn,Dn
–(An),–(An)
(An)+,(An)+
Dn,Dn,#<data >
–(An),–(An),#<data >
Dn,Dn,#<data >
–(An),–(An),#<data >
M68020 USER’S MANUAL
Best Case
14(2/0/1)
14(2/0/1)
10(2/0/1)
10(2/0/1)
11(1/0/1)
11(1/0/1)
4(0/0/0)
4(0/0/0)
2(0/0/0)
2(0/0/0)
8(2/0/0)
3(0/0/0)
5(0/0/0)
Cache Case
16(2/0/1)
16(2/0/1)
12(2/0/1)
12(2/0/1)
13(1/0/1)
13(1/0/1)
4(0/0/0)
4(0/0/0)
2(0/0/0)
2(0/0/0)
9(2/0/0)
6(0/0/0)
8(0/0/0)
Worst Case
17(2/1/1)
17(2/1/1)
13(2/1/1)
13(2/1/1)
10(2/1/0)
13(1/1/1)
13(1/1/1)
5(0/1/0)
5(0/1/0)
3(0/1/0)
3(0/1/0)
7(0/1/0)
9(0/1/0)
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