h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 276

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 8 Data Transfer Controller (DTC)
Table 8-9
The number of execution states is calculated from the formula below. Note that
of all transfers activated by one activation event (the number in which the CHNE bit is set to 1,
plus 1).
Number of execution states = I · (S
For example, when the DTC vector address table is located in on-chip ROM, normal mode is set,
and data is transferred from the on-chip ROM to an internal I/O register, the time required for the
DTC operation is 14 states. The time from activation to the end of the data write is 11 states.
Rev. 6.00 Feb 22, 2005 page 216 of 1484
REJ09B0103-0600
Object to be Accessed
Bus width
Access states
Execution
status
Vector read
Register
information
read/write
Byte data read
Word data read
Byte data write
Word data write
Internal operation S
Number of States Required for Each Execution Status
S
S
S
S
S
S
I
J
K
K
L
L
M
I
+ 1) +
On-
Chip
RAM
32
1
—
1
1
1
1
1
1
(J · S
On-
Chip
ROM
16
1
1
—
1
1
1
1
1
J
+ K · S
On-Chip I/O
Registers
8
2
—
—
2
4
2
4
1
K
+ L · S
16
2
—
—
2
2
2
2
1
L
) + M · S
External Devices
8
2
4
—
2
4
2
4
1
8
3
6 + 2m
—
3 + m
6 + 2m
3 + m
6 + 2m
1
M
means the sum
16
2
2
—
2
2
2
2
1
16
3
3 + m
—
3 + m
3 + m
3 + m
3 + m
1