r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 371

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Figure 7.3 illustrates operation in sequential mode.
The number of transfers is specified as 16 bits in ETCR. ETCR is decremented by 1 each time a
data transfer is executed, and when its value reaches H'0000, the DTE bit is cleared and data
transfer ends. If the DTIE bit is set to 1 at this time, an interrupt request is sent to the CPU or
DTC. The maximum number of transfers, when H'0000 is set in ETCR, is 65,536.
Transfer requests (activation sources) consist of A/D converter conversion end interrupts, external
requests, SCI transmission complete and reception complete interrupts, and TPU channel 0 to 5
compare match/input capture A interrupts. External requests can only be specified for channel B.
Address T
Address B
Figure 7.3 Operation in Sequential Mode
Transfer
1 byte or word transfer performed in
response to 1 transfer request
Legend:
Address T = L
Address B = L + (–1)
Where : L = Value set in MAR
N = Value set in ETCR
Rev. 1.00 Sep. 19, 2008 Page 343 of 1270
Section 7 DMA Controller (DMAC)
DTID
· (2
DTSZ
· (N – 1))
REJ09B0466-0100
IOAR