h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 262

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 8 Data Transfer Controller (DTC)
8.3.2
The DTC operates when activated by an interrupt or by a write to DTVECR by software. An
interrupt request can be directed to the CPU or DTC, as designated by the corresponding DTCER
bit. An interrupt becomes a DTC activation source when the corresponding bit is set to 1, and a
CPU interrupt source when the bit is cleared to 0.
At the end of a data transfer (or the last consecutive transfer in the case of chain transfer), the
activation source or corresponding DTCER bit is cleared. Table 8-3 shows activation source and
DTCER clearance. The activation source flag, in the case of RXI0, for example, is the RDRF flag
of SCI0.
Table 8-3
Rev. 6.00 Feb 22, 2005 page 202 of 1484
REJ09B0103-0600
Activation Source
Software activation The SWDTE bit is cleared to 0
Interrupt activation
Activation Sources
Activation Source and DTCER Clearance
When the DISEL Bit Is 0 and
the Specified Number of
Transfers Have not Ended
The corresponding DTCER bit
remains set to 1
The activation source flag is
cleared to 0
When the DISEL Bit Is 1, or when
the Specified Number of Transfers
Have Ended
The SWDTE bit remains set to 1
An interrupt is issued to the CPU
The corresponding DTCER bit is cleared
to 0
The activation source flag remains set to 1
A request is issued to the CPU for the
activation source interrupt