HD6417144 RENESAS [Renesas Technology Corp], HD6417144 Datasheet - Page 170

• Manufacturer Part Number: HD6417144
• Description: 32-Bit RISC Microcomputer SuperHTM RISC engine Family/SH7144 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

8. Data Transfer Controller (DTC)
The 32-bit DTSAR designates the DTC transfer source address and the 32-bit DTDAR designates
the transfer destination address. After each transfer, DTSAR and DTDAR are independently
incremented, decremented, or left fixed depending on its register information.
Rev.4.00 Mar. 27, 2008 Page 126 of 882
REJ09B0108-0400
DTCRA = DTCRA – 1 (normal/block transfer mode)
DTCRAL = DTCRAL – 1 (repeat mode)
DTSAR, DTDAR update
DTCRB = DTCRB – 1 (block transfer mode)
When DISEL = 1 or DTCRA = 0 (normal/block transfer mode)
When DISEL = 1 (repeat transfer mode)
DTMR, DTCR, DTIAR, DTSAR, DTDAR
Transfer information write
Transfer information read
Transfer (1 transfer unit)
Figure 8.5 DTC Operation Flowchart
NMI or address error
DTC vector read
NMIF = AE = 0?
Transfer request
Initial settings
NMIF • NMIM
generated?
+ AE = 1?
Start
End
CPU interrupt request
Yes
Yes
Yes
No
No
No
Transfer information write
transfer mode and
DTCRB ≠ 0?
CHNE = 0?
Block
No
Yes
Yes
No