h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 167
h8s-2649
Manufacturer Part Number
h8s-2649
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2649.pdf
(766 pages)
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7.6.2
As with the basic bus interface, either program wait insertion or pin wait insertion using the WAIT
pin can be used in the initial cycle (full access) on the burst ROM interface. See section 7.5.4,
Wait Control. Wait states cannot be inserted in a burst cycle.
7.6.3
When a write access to burst ROM interface space is executed, burst access is interrupted at that
point and the write access is executed in line with the basic bus interface settings. Write accesses
are not performed in burst mode even though burst ROM space is designated.
Wait Control
Write Access
Figure 7.15 Example of Burst ROM Access Timing
Address bus
Note: n = 1 and 0
Data bus
RD
AS
φ
(AST0 = 0 and BRSTS1 = 0)
T
1
Full access
Read data
T
2
Read data
Only the lower address changes
T
Burst access
1
Rev. 2.00 Dec. 05, 2005 Page 129 of 724
Read data
T
1
Section 7 Bus Controller (BSC)
REJ09B0200-0200
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