H8S2556 Datasheet, PDF (221/982 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8S Family/H8S/2500 Series

Section 8 Data Transfer Controller (DTC)
Table 8.1 Activation Source and DTCER Clearing
Activation Source
Software activation
Interrupt activation
The DISEL Bit is 0, and Transfer The DISEL Bit is 1, or Transfer
Counts Specified have not Ended Counts Specified have Ended
• The SWDTE bit is cleared to 0
• The SWDTE bit retains 1
• The interrupt request is sent to the
CPU
• The corresponding DTCER bit
retains 1
• The corresponding DTCER bit is
cleared to 0
• The activation source flag is
cleared to 0
• The activation source flag retains 1
• The interrupt request which
becomes an activation source is
sent to the CPU
Source flag cleared
Clear
DTCER
Select
Clear
controller
Clear request
On-chip
peripheral
module
DTC
IRQ interrupt _Interrupt
request
DTVECR
Interrupt controller
Interrupt mask
CPU
Figure 8.2 Block Diagram of DTC Activation Source Control
Rev.5.00 Sep. 27, 2007 Page 175 of 932
REJ09B0099-0500