HD6432670 Hitachi, HD6432670 Datasheet - Page 95

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Table 2.11 Addressing Modes
No.
1
2
3
4
5
6
7
8
2.7.1
The register field of the instruction code specifies an 8-, 16-, or 32-bit general register containing
the operand. R0H to R7H and R0L to R7L can be specified as 8-bit registers. R0 to R7 and E0 to
E7 can be specified as 16-bit registers. ER0 to ER7 can be specified as 32-bit registers.
2.7.2
The register field of the instruction code specifies an address register (ERn) which contains the
address of the operand on memory. If the address is a program instruction address, the lower 24
bits are valid and the upper 8 bits are all assumed to be 0 (H'00).
2.7.3
A 16-bit or 32-bit displacement contained in the instruction is added to an address register (ERn)
specified by the register field of the instruction code, and the sum gives the address of a memory
operand. A 16-bit displacement is sign-extended when added.
2.7.4
Register indirect with post-increment—@ERn+: The register field of the instruction code
specifies an address register (ERn) which contains the address of a memory operand. After the
operand is accessed, 1, 2, or 4 is added to the address register contents and the sum is stored in the
address register. The value added is 1 for byte access, 2 for word transfer instruction, or 4 for
longword transfer instruction. For word or longword transfer instruction, the register value should
be even.
Register Direct—Rn
Register Indirect—@ERn
Register Indirect with Displacement—@(d:16, ERn) or @(d:32, ERn)
Register Indirect with Post-Increment or Pre-Decrement—@ERn+ or @-ERn
Addressing Mode
Register direct
Register indirect
Register indirect with displacement
Register indirect with post-increment
Register indirect with pre-decrement
Absolute address
Immediate
Program-counter relative
Memory indirect
@@aa:8
Symbol
Rn
@ERn
@(d:16,ERn)/@(d:32,ERn)
@ERn+
@–ERn
@aa:8/@aa:16/@aa:24/@aa:32
#xx:8/#xx:16/#xx:32
@(d:8,PC)/@(d:16,PC)
Rev. 2.0, 04/02, page 49 of 906