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H8/3028F 数据表(PDF) 253 Page - Renesas Technology Corp

部件名 H8/3028F
功能描述  Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
PDF  923 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

H8/3028F 数据表(HTML) 253 Page - Renesas Technology Corp

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Rev. 2.00, 09/03, page 223 of 890
If M (1 to 255) is the size of the block transferred at each request and N (1 to 65,536) is the
number of blocks to be transferred, then ETCRAH and ETCRAL should initially be set to M and
ETCRB should initially be set to N.
Figure 7.10 illustrates how block transfer mode operates. In this figure, bit TMS is cleared to 0,
meaning the block area is the destination.
T
B
Transfer
Legend
L
L
M
N
T
B
T
B
Address T
M bytes or words are
transferred per request
Address B
A
A
Block 1
Block N
B
B
Block area
Block 2
= initial setting of MARA
= initial setting of MARB
= initial setting of ETCRAH and ETCRAL
= initial setting of ETCRB
= L
= L + SAIDE • (–1)
• (2
• M – 1)
= L
= L + DAIDE • (–1)
• (2
• M – 1)
A
A
B
B
A
B
A
A
B
B
SAID
DAID
DTSZ
DTSZ
Figure 7.10 Operation in Block Transfer Mode



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