R0K561622S000BE Renesas Electronics America, R0K561622S000BE Datasheet - Page 266

• Manufacturer Part Number: R0K561622S000BE
• Description: KIT STARTER FOR H8SX/1622
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: MCUr

Specifications of R0K561622S000BE

• Contents: Board, Cables, CD, Debugger, Power Supply
• Silicon Manufacturer: Renesas
• Features: Coding And Debugging, E10A Emulator, RS232 Serial Connection
• Kit Contents: Board
• Silicon Family Name: H8SX/1622F
• Silicon Core Number: R5F61622N50LGV
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: H8SX/1622
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

Section 8 Bus Controller (BSC)
When consecutively reading from the same area connected to a peripheral LSI whose data hold
time is long, data outputs from the peripheral LSI and this LSI may conflict. Inserting the chip
select assertion period extension cycle after the access cycle can avoid the data conflict.
Figure 8.35 shows an example of the operation. In the figure, both bus cycles A and B are read
access cycles to the address/data multiplexed I/O space. An example of the data conflict is shown
in (a), and an example of avoiding the data conflict by the CS assertion period extension cycle in
(b).
Rev. 2.00 Sep. 16, 2009 Page 236 of 1036
REJ09B0414-0200
Bφ
Address bus
CS
AH
RD
Data bus
Bφ
Address bus
CS
AH
RD
Data bus
Figure 8.35 Consecutive Read Accesses to Same Area
(a) Without CS assertion period extension cycle (CSXTn = 0)
(b) With CS assertion period extension cycle (CSXTn = 1)
(Address/Data Multiplexed I/O Space)
Bus cycle A
Bus cycle A
Data hold time is long.
Bus cycle B
Data conflict
Bus cycle B