HD6435348R Hitachi Semiconductor, HD6435348R Datasheet - Page 139
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HD6435348R
Manufacturer Part Number
HD6435348R
Description
Single-Chip Microcomputer
Manufacturer
Hitachi Semiconductor
Datasheet
1.HD6435348R.pdf
(487 pages)
- Current page: 139 of 487
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Note: TA , TA ,... : Addresses of DTC register information tables in memory.
6.3.2 DTC Vector Table
The DTC vector table is located immediately following the exception vector table at the beginning
of page 0 in memory. For each interrupt that can request DTC service, the DTC vector table
provides a pointer to an address in memory where the table of DTC control register information
for that interrupt is stored. The register information tables can be placed in any available locations
in page 0.
In minimum mode, each entry in the DTC vector table consists of two bytes, pointing to an
address in page 0. In maximum mode, for compatibility reasons, each DTC vector table entry
consists of four bytes but the first two bytes are ignored; the last two bytes point to an address
which is implicitly assumed to be in page 0, regardless of the current page specifications.
Figure 6-4 shows one DTC vector table entry in minimum and maximum mode.
Note: TA
0
Normally the register information tables are placed on RAM. If software does not
need to modify the register information (addresses are fixed and transfer count is 1),
it can be placed on ROM.
Vector table
Exception
vector table
DTC vector
table
1
0
, TA
TA
TA
1
0
1
, ...: Addresses of DTC register information tables in memory.
TA
TA
Figure 6-3 DTC Vector Table
1
0
Register
information table
0
Register
information table
1
RAM
120
DTMR0
DTSR0
DTDR0
DTCR0
DTMR1
DTSR1
DTDR1
DTCR1
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