R0K561622S000BE Renesas Electronics America, R0K561622S000BE Datasheet - Page 268
R0K561622S000BE
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
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Section 8 Bus Controller (BSC)
8.10
In this LSI, idle cycles can be inserted between the consecutive external accesses. By inserting the
idle cycle, data conflicts between ROM read cycle whose output floating time is long and an
access cycle from/to high-speed memory or I/O interface can be prevented.
8.10.1
When this LSI consecutively accesses external address space, it can insert an idle cycle between
bus cycles in the following four cases. These conditions are determined by the sequence of read
and write and previously accessed area.
1. When read cycles of different areas in the external address space occur consecutively
2. When an external write cycle occurs immediately after an external read cycle
3. When an external read cycle occurs immediately after an external write cycle
4. When an external access occurs immediately after a DMAC single address transfer (write
Up to four idle cycles can be inserted under the conditions shown above. The number of idle
cycles to be inserted should be specified to prevent data conflicts between the output data from a
previously accessed device and data from a subsequently accessed device.
Under conditions 1 and 2, which are the conditions to insert idle cycles after read, the number of
idle cycles can be selected from setting A specified by bits IDLCA1 and IDLCA0 in IDLCR or
setting B specified by bits IDLCB1 and IDLCB0 in IDLCR: Setting A can be selected from one to
four cycles, and setting B can be selected from one or two to four cycles. Setting A or B can be
specified for each area by setting bits IDLSEL7 to IDLSEL0 in IDLCR. Note that bits IDLSEL7
to IDLSEL0 correspond to the previously accessed area of the consecutive accesses.
The number of idle cycles to be inserted under conditions 3 and 4, which are conditions to insert
idle cycles after write, can be determined by setting A as described above.
After the reset release, IDLCR is initialized to four idle cycle insertion under all conditions 1 to 4
shown above.
Table 8.20 shows the correspondence between conditions 1 to 4 and number of idle cycles to be
inserted for each area. Table 8.21 shows the correspondence between the number of idle cycles to
be inserted specified by settings A and B, and number of cycles to be inserted.
Rev. 2.00 Sep. 16, 2009 Page 238 of 1036
REJ09B0414-0200
cycle)
Idle Cycle
Operation
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