h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 198

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 7 Bus Controller
7.5.3
As with the basic bus interface, either program wait insertion or pin wait insertion using the WAIT
pin can be used in the burst ROM interface initial cycle (full access). See section 7.4.5, Wait
Control.
Wait states cannot be inserted in the burst cycle.
7.6
7.6.1
When the H8S/2646 Group accesses external space, it can insert a 1-state idle cycle (T
bus cycles in the following two cases: (1) when read accesses between different areas occur
consecutively, and (2) when a write cycle occurs immediately after a read cycle. By inserting an
idle cycle it is possible, for example, to avoid data collisions between ROM, with a long output
floating time, and high-speed memory, I/O interfaces, and so on.
Rev. 5.00 Sep 22, 2005 page 172 of 1136
REJ09B0257-0500
Wait Control
Idle Cycle
Operation
I
) between