h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 198

• Manufacturer Part Number: h8s-2158
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 7 Data Transfer Controller (DTC)
7.2
The DTC has the following registers.
These six registers cannot be directly accessed from the CPU. When a DTC activation interrupt
source occurs, the DTC reads a set of register information that is stored in on-chip RAM to the
corresponding DTC registers and transfers data. After the data transfer, it writes a set of updated
register information back to on-chip RAM.
Rev. 3.00 Jan 25, 2006 page 146 of 872
REJ09B0286-0300
DTC mode register A (MRA)
DTC mode register B (MRB)
DTC source address register (SAR)
DTC destination address register (DAR)
DTC transfer count register A (CRA)
DTC transfer count register B (CRB)
Interrupt
request
Register Descriptions
Legend:
MRA, MRB
CRA, CRB
SAR
DAR
DTCERA to DTCERE
DTVECR
Interrupt controller
CPU interrupt
request
: DTC mode register A, B
: DTC transfer count register A, B
: DTC source address register
: DTC destination register
: DTC enable registers A to E
: DTC vector register
Figure 7.1 Block Diagram of DTC
DTC
Internal address bus
Internal data bus
On-chip RAM