HD6432670 Hitachi, HD6432670 Datasheet - Page 440

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

9.2
DTC has the following registers.
These six registers cannot be directly accessed from the CPU. When activated, the DTC reads a set
of register information that is stored in an 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 the
RAM.
Rev. 2.0, 04/02, page 394 of 906
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)
DTC enable registers A to G (DTCERA to DTCERG)
Interrupt
request
Register Descriptions
Legend
MRA, MRB
CRA, CRB
SAR
DAR
DTCERA to DTCERG
DTVECR
Interrupt controller
CPU interrupt
request
Figure 9.1 Block Diagram of DTC
: DTC mode registers A and B
: DTC transfer count registers A and B
: DTC source address register
: DTC destination address register
: DTC enable registers A to G
: DTC vector register
DTC
Internal address bus
Internal data bus
On-chip
RAM