HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 146

• Manufacturer Part Number: HD6432160
• Description: Hitachi 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

5.6.5
The DTC can be activated by an interrupt. In this case, the following options are available:
For details on interrupt requests that can be used to activate the DTC, see section 7, Data Transfer
Controller (DTC).
Figure 5.8 shows a block diagram of the DTC and interrupt controller.
Selection of Interrupt Source: Interrupt factors are selected as DTC activation source or CPU
interrupt source by the DTCE bit of DTCERA to DTCERE of DTC.
By specifying the DISEL bit of the DTC’s MRB, it is possible to clear the DTCE bit to 0 after
DTC data transfer, and request a CPU interrupt.
If DTC carries out the designate number of data transfers and the transfer counter reads 0, after
DTC data transfer, the DTCE bit is also cleared to 0, and an interrupt is requested to the CPU.
Determination of Priority: The DTC activation source is selected in accordance with the default
priority order, and is not affected by mask or priority levels. See table 7.1 for the respective
priority.
Rev. 2.0, 08/02, page 106 of 788
On-chip
supporting
module
Interrupt request to CPU
Activation request to DTC
Selection of a number of the above
IRQ
interrupt
DTC Activation by Interrupt
Interrupt source
clear signal
Interrupt
request
Figure 5.8 DTC and Interrupt Controller
Interrupt controller
Selection
DTVECR
DTCER
circuit
Select
signal
clear signal
Clear signal
SWDTE
Determination of
Control logic
priority
DTC activation
request vector
number
CPU interrupt
request vector
number
Clear signal
I, UI
CPU
DTC