r5s72060w200fpv Renesas Electronics Corporation., r5s72060w200fpv Datasheet - Page 341

• Manufacturer Part Number: r5s72060w200fpv
• Description: 32-bit Risc Microcomputer Superhtm Risc Engine Family / Sh7200 Series
• Manufacturer: Renesas Electronics Corporation.

(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 8.32 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 8.32 Power-Down Mode Access Timing
2. The waveform for DACKn is when active low is specified.
Tnop
Tr
Tc1
Td1
Rev. 2.00 Dec. 09, 2005 Page 317 of 1152
Tde
Section 8 Bus State Controller (BSC)
Tap
Power-down
REJ09B0191-0200