Datasheet

Table Of Contents
Section 8 Data Transfer Controller (DTC)
Page 222 of 846 REJ09B0140-0900 Rev. 9.00
Sep 16, 2010
H8S/2215 Group
8.5.5 Interrupts
An interrupt request is issued to the CPU when the DTC finishes the specified number of data
transfers, or a data transfer for which the DISEL bit was set to 1. In the case of interrupt activation,
the interrupt set as the activation source is generated. These interrupts to the CPU are subject to
CPU mask level and interrupt controller priority level control.
In the case of activation by software, a software activated data transfer end interrupt (SWDTEND)
is generated. When the DISEL bit is 1 and one data transfer has ended, or the specified number of
transfers have ended, after data transfer ends, the SWDTE bit is held at 1 and an SWDTEND
interrupt is generated. The interrupt handling routine should clear the SWDTE bit to 0.
When the DTC is activated by software, an SWDTEND interrupt is not generated during a data
transfer wait or during data transfer even if the SWDTE bit is set to 1.
8.5.6 Operation Timing
Figures 8.10 to 8.12 show the DTC operation timing.
φ
DTC activation
request
DTC
request
Address
Vector read
Read Write
Data transfer
Transfer
information write
Transfer
information read
Figure 8.10 DTC Operation Timing (Example in Normal Mode or Repeat Mode)