HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 233

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

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 8-10 illustrates how block transfer mode operates. In this figure, bit TMS is cleared to 0,
meaning the block area is the destination.
Legend
L
L
M
N
T
B
T
B
T
B
A
A
A
B
A
A
B
B
= initial setting of MARA
= initial setting of MARB
= initial setting of ETCRAH and ETCRAL
= initial setting of ETCRB
= L
= L + SAIDE • (–1)
= L
= L + DAIDE • (–1)
A
A
B
B
Block 1
Block N
Block 2
SAID
DAID
Figure 8-10 Operation in Block Transfer Mode
• (2
• (2
DTSZ
DTSZ
• M – 1)
• M – 1)
M bytes or words are
transferred per request
Transfer
219
Block area
Address T
Address B
B
B