Section 7 Data Transfer Controller (DTC)
Rev. 3.00 Jan 25, 2006 page 163 of 872
REJ09B0286-0300
7.5.7
Number of DTC Execution States
Table 7.6 lists the execution status for a single DTC data transfer, and table 7.7 shows the number
of states required for each execution status.
Table 7.6
DTC Execution Status
Mode
Vector Read
I
Register Information
Read/Write
J
Data Read
K
Data Write
L
Internal
Operations
M
Normal
1
6
1
1
3
Repeat
1
6
1
1
3
Block transfer
1
6
N
N
3
N: Block size (initial setting of CRAH and CRAL)
Table 7.7
Number of States Required for Each Execution Status
Object to be Accessed
On-Chip RAM
(H'(FF)EC00 to
H'(FF)EFFF)
On-Chip RAM
(On-Chip RAM
other than left)
On-
Chip
ROM
On-Chip I/O
Registers
External Devices
Bus width
32
16
16
8
16
8
8
16
16
Access states
1
1
1
2
2
2
3
2
3
Vector read
S
I
—
—
1
—
—
4
6 + 2m
2
3 + m
Execution
status
Register information
read/write S
J
1
—
—
—
—
—
—
—
—
Byte data read
S
K
1
1
1
2
2
2
3 + m
2
3 + m
Word data read
S
K
1
1
1
4
2
4
6 + 2m
2
3 + m
Byte data write
S
L
1
1
1
2
2
2
3 + m
2
3 + m
Word data write
S
L
1
1
1
4
2
4
6 + 2m
2
3 + m
Internal operation S
M
1
1
1
1
1
1
1
1
1
The number of execution states is calculated from using the formula below. Note that
Σ
is the sum
of all transfers activated by one activation source (the number in which the CHNE bit is set to 1,
plus 1).
Number of execution states = I · S
I
+
Σ
(J · S
J
+ K · S
K
+ L · S
L
) + M · S
M
For example, when the DTC vector address table is located in on-chip ROM, normal mode is set,
and data is transferred from on-chip ROM to an internal I/O register, then the time required for the
DTC operation is 13 states. The time from activation to the end of data write is 10 states.
Содержание H8S/2158
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Страница 326: ...Section 10 8 Bit PWM Timer PWM Rev 3 00 Jan 25 2006 page 272 of 872 REJ09B0286 0300...
Страница 440: ...Section 15 Watchdog Timer WDT Rev 3 00 Jan 25 2006 page 386 of 872 REJ09B0286 0300...
Страница 606: ...Section 17 I 2 C Bus Interface IIC Rev 3 00 Jan 25 2006 page 552 of 872 REJ09B0286 0300...
Страница 742: ...Section 19 Multimedia Card Interface MCIF Rev 3 00 Jan 25 2006 page 688 of 872 REJ09B0286 0300...
Страница 744: ...Section 20 Encryption Operation Circuit DES and GF Rev 3 00 Jan 25 2006 page 690 of 872 REJ09B0286 0300...
Страница 750: ...Section 21 D A Converter Rev 3 00 Jan 25 2006 page 696 of 872 REJ09B0286 0300...
Страница 768: ...Section 22 A D Converter Rev 3 00 Jan 25 2006 page 714 of 872 REJ09B0286 0300...
Страница 770: ...Section 23 RAM Rev 3 00 Jan 25 2006 page 716 of 872 REJ09B0286 0300...
Страница 824: ...Section 26 Clock Pulse Generator Rev 3 00 Jan 25 2006 page 770 of 872 REJ09B0286 0300...
Страница 844: ...Section 27 Power Down Modes Rev 3 00 Jan 25 2006 page 790 of 872 REJ09B0286 0300...
Страница 878: ...Section 28 List of Registers Rev 3 00 Jan 25 2006 page 824 of 872 REJ09B0286 0300...
Страница 926: ...Index Rev 3 00 Jan 25 2006 page 872 of 872 REJ09B0286 0300...