R0K572011S000BE Renesas Electronics America, R0K572011S000BE Datasheet - Page 1018

• Manufacturer Part Number: R0K572011S000BE
• Description: KIT STARTER FOR SH7201
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: MCUr

Specifications of R0K572011S000BE

• Contents: CPU Board, LCD Display Module, E8 Emulator, Cable, QuickStart Guide and CD-ROM
• For Use With/related Products: SH7201
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Section 24 On-Chip RAM
24.2
24.2.1
When the same page is accessed from different buses simultaneously, a conflict on the page
occurs. Although each access is completed correctly, this kind of conflict degrades the memory
access speed. Therefore, it is advisable to provide software measures to prevent such conflicts as
far as possible. For example, no conflict will arise if different memory modules or different pages
are accessed by each bus.
24.2.2
Before disabling memory operation or write access through the RAME or RAMWE bit, be sure to
read from any address and then write to the same address in each page; otherwise, the last written
data in each page may not be actually written to the RAM.
Page 990 of 1190
// For RAM page 0
// For RAM page 1
Usage Notes
Page Conflict
RAME and RAMWE Bits
MOV.L
MOV.L
MOV.L
MOV.L
MOV.L
MOV.L
Figure 24.1 Examples of Read/Write before Disabling RAM
#H'FFF80000,R0
@R0,R1
R1,@R0
#H'FFF84000,R0
@R0,R1
R1,@R0
R01UH0026EJ0300 Rev. 3.00
SH7201 Group
Sep 24, 2010