R0K572115S000BE Renesas Electronics America, R0K572115S000BE Datasheet - Page 264

• Manufacturer Part Number: R0K572115S000BE
• Description: KIT STARTER FOR SH7211
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: Microcontrollerr

Specifications of R0K572115S000BE

• Contents: CPU Board, LCD Display Module, E8 Emulator, Cable, QuickStart Guide and CD-ROM
• For Use With/related Products: SH7211
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

8.5.4
The number of cycles from CSn assertion to RD, WEn assertion can be specified by setting bits
SW1 and SW0 in CSnWCR. The number of cycles from RD, WEn negation to CSn negation can
be specified by setting bits HW1 and HW0. Therefore, a flexible interface to an external device
can be obtained. Figure 8.9 shows an example. A Th cycle and a Tf cycle are added before and
after an ordinary cycle, respectively. In these cycles, RD and WEn are not asserted, while other
signals are asserted. The data output is prolonged to the Tf cycle, and this prolongation is useful
for devices with slow writing operations.
Rev. 3.00 Mar. 04, 2009 Page 238 of 1168
REJ09B0344-0300
CSn Assert Period Expansion
Write
Read
D15 to D0
D15 to D0
A25 to A0
Figure 8.9 CSn Assert Period Expansion
DACKn*
RD/WR
Note: * The waveform for DACKn is when active low is specified.
WEn
CSn
RD
CK
BS
Th
T1
T2
Tf