HD6432646 Hitachi, HD6432646 Datasheet - Page 216

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

8.1.2
Figure 8-1 shows a block diagram of the DTC.
The DTC’s register information is stored in the on-chip RAM*. A 32-bit bus connects the DTC to
the on-chip RAM (1 kbyte), enabling 32-bit/1-state reading and writing of the DTC register
information.
Note: * When the DTC is used, the RAME bit in SYSCR must be set to 1.
182
Interrupt
request
Block Diagram
Legend
MRA, MRB
CRA, CRB
SAR
DAR
DTCERA to DTCERG, I
DTVECR
Interrupt controller
CPU interrupt
request
Figure 8-1 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, I
: DTC vector register
DTC
Internal address bus
Internal data bus
On-chip
RAM