R0K572030S000BE Renesas Electronics America, R0K572030S000BE Datasheet - Page 385

• Manufacturer Part Number: R0K572030S000BE
• Description: KIT DEV FOR SH7203
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: MCUr

Specifications of R0K572030S000BE

• Contents: CPU Board, LCD Module, E10A-Lite Emulator, Cable, QuickStart Guide and CD-ROM
• Silicon Manufacturer: Renesas
• Kit Contents: Board
• Silicon Family Name: SH7203
• Silicon Core Number: R5S72030W200FP
• Tool / Board Applications: General Purpose MCU, MPU, DSP, DSC
• Mcu Supported Families: SH7203
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: SH7203
• Lead Free Status / Rohs Status: Compliant

(11) Power-Down Mode
If the PDOWN bit in SDCR is set to 1, the SDRAM is placed in power-down mode by bringing
the CKE signal to the low level in the non-access cycle. This power-down mode can effectively
lower the power consumption in the non-access cycle. However, please note that if an access
occurs in power-down mode, a cycle of overhead occurs because a cycle is needed to assert the
CKE in order to cancel the power-down mode.
Figure 9.31 shows the access timing in power-down mode.
RASL, RASU
CASL, CASU
A12/A11*
D31 to D0
A25 to A0
DACKn*
RD/WR
DQMxx
CKIO
CKE
CSn
BS
1
2
Power-down
Notes: 1. Address pin to be connected to pin A10 of SDRAM.
Figure 9.31 Power-Down Mode Access Timing
2. The waveform for DACKn is when active low is specified.
Tnop
Tr
Tc1
Td1
Rev. 3.00 Sep. 28, 2009 Page 353 of 1650
Tde
Section 9 Bus State Controller (BSC)
Tap
Power-down
REJ09B0313-0300