HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 77
HD6412240
Manufacturer Part Number
HD6412240
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412240.pdf
(818 pages)
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2.5.2
Figure 2.11 shows the data formats in memory. The CPU can access word data and longword data
in memory, but word or longword data must begin at an even address. If an attempt is made to
access word or longword data at an odd address, no address error occurs but the least significant
bit of the address is regarded as 0, so the access starts at the preceding address. This also applies to
instruction fetches.
When SP(ER7) is used as an address register to access the stack, the operand size should be word
size or longword size.
Memory Data Formats
Data Type
1-bit data
Byte data
Word data
Longword data
Figure 2.11 Memory Data Formats
Address 2M + 1
Address 2N + 1
Address 2N + 2
Address 2N + 3
Address 2M
Address 2N
Address
Address L
Address L
MSB
MSB
MSB
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Rev.3.00 Mar. 26, 2007 Page 35 of 772
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Section 2 CPU
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