HD6433682 ETC, HD6433682 Datasheet - Page 51
HD6433682
Manufacturer Part Number
HD6433682
Description
Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series
Manufacturer
ETC
Datasheet
1.HD6433682.pdf
(504 pages)
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2.3.2
Figure 2.6 shows the data formats in memory. The H8/300H CPU can access word data and
longword data in memory, however 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, an address error does not
occur, however the least significant bit of the address is regarded as 0, so access begins the
preceding address. This also applies to instruction fetches.
When ER7 (SP) is used as an address register to access the stack area, the operand size should be
word or longword.
Memory Data Formats
Data Type
1-bit data
Byte data
Word data
Longword data
Figure 2.6 Memory Data Formats
Address
Address L
Address L
Address 2M
Address 2M+1
Address 2N
Address 2N+1
Address 2N+2
Address 2N+3
MSB
MSB
MSB
7
7
6
Data Format
5
4
3
Rev. 3.00, 05/03, page 21 of 472
2
1
LSB
LSB
LSB
0
0
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