HD6475328-CP10 HITACHI [Hitachi Semiconductor], HD6475328-CP10 Datasheet - Page 66

• Manufacturer Part Number: HD6475328-CP10
• Description: original Hitachi CMOS microcomputer unit (MCU)
• Manufacturer: HITACHI [Hitachi Semiconductor]

3.4.3 Effective Address Calculation
Table 3-8 explains how the effective address is calculated in each addressing mode.
Table 3-8 Effective Address Calculation
No.
1
2
3
4
Addressing Mode Effective Address Calculation
Register direct
Rn
1010Sz
Register indirect
@Rn
1101Sz
Register indirect
with displacement
@(d:8,Rn)
1110Sz
@(d:16,Rn)
1111Sz
Register indirect
with pre-decrement
@–Rn
1011Sz
Register indirect
with post-increment
@Rn+
1100Sz
rrr
rrr
rrr
rrr
rrr
rrr
—
—
8 Bits
15
15
16 Bits
15
15
15
—
Rn is incremented by +1 or +2
after instruction execution.
Rn is decremented by –1 or –2
before instruction execution.
Displacement with
sign extension
Displacement
Rn
Rn
Rn
1 or 2
0
0
0
0
0
47
*3*4*5
–
+
+
*3*4*5
Operand is contents of
Rn
23
Or TP or EP
23
Or TP or EP
23
Or TP or EP
23
Or TP or EP
23
Or TP or EP
Effective Address
DP
DP
DP
DP
DP
*1
*1
*1
*1
*1
15
15
15
15
15
*2
*2
*2
*2
*2
Result
Result
Result
Rn
Rn
0
0
0
0
0