349
6.3.2
Block Diagram
DTC register information is located in on-chip RAM*. As the DTC and on-chip RAM (1-kbyte)
are connected by a 32-bit bus, a 32-bit read or write of DTC register information can be executed
in one state.
Note: * When the DTC is used, the RAME bit must be set to 1 in SYSCR.
Internal address bus
DTCERA
to
DTCERH
DTVECR
Interrupt controller
DTC
On-chip RAM
Internal data bus
DTC
activa-
tion
request
CPU
interrupt
request
MRA
MRB
CRA
CRB
DAR
SAR
Interrupt
request
Legend
MRA, MRB:
DTC mode registers A and B
CRA, CRB:
DTC transfer count registers A and B
SAR:
DTC source address register
DAR:
DTC destination address register
DTCERA to DTCERH: DTC enable registers A to H
DTVECR:
DTC vector register
Control logic
Register information
Figure 6.3 Block Diagram of DTC
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