HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 171

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

5.6.2
Figure 5.10 shows a block diagram of the DTC and interrupt controller.
5.6.3
The interrupt controller has three main functions in DTC control.
(1) Selection of Interrupt Source
Interrupt sources can be specified as DTC activation requests or CPU interrupt requests by means
of the DTCE bit of DTCEA to DTCEF in the DTC.
After a DTC data transfer, the DTCE bit can be cleared to 0 and an interrupt request sent to the
CPU in accordance with the specification of the DISEL bit of MRB in the DTC.
When the DTC has performed the specified number of data transfers and the transfer counter value
is zero, the DTCE bit is cleared to 0 and an interrupt request is sent to the CPU after the DTC data
transfer.
On-chip
supporting
module
IRQ
interrupt
Block Diagram
Operation
Interrupt source
clear signal
Interrupt
request
Interrupt controller
Figure 5.10 Interrupt Control for DTC
Selection
DTVECR
DTCER
circuit
Select
signal
clear signal
Clear signal
SWDTE
Determination of
Control logic
Rev.3.00 Mar. 26, 2007 Page 129 of 772
priority
Section 5 Interrupt Controller
CPU interrupt
request vector
number
DTC activation
request vector
number
Clear signal
I, UI
REJ09B0355-0300
DTC
CPU