r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 498

• Manufacturer Part Number: r5s77631ay266bgv
• Description: Renesas 32-bit Risc Microcomputer Superhtm Risc Engine Family Sh-4a Series
• Manufacturer: Renesas Electronics Corporation.

Section 12 DDR-SDRAM Interface (DDRIF)
12.5.3
Table 12.6 shows the DDR-SDRAM commands supported by the DDRIF.
Table 12.6 DDR-SDRAM Commands Issued by DDRIF
[Legend]
H:
L:
X:
V:
The DESL command in table 12.6 is issued when the DDR-SDRAM is not accessed by modules.
The DESL command therefore cannot be issued by the user.
Rev. 1.00 Oct. 01, 2007 Page 432 of 1956
REJ09B0256-0100
Function
Device deselect
No operation
Read
Read with auto precharge READA
Write
Write with auto precharge WRITEA
Bank activate
Precharge select bank
Precharge all banks
Auto refresh
Self-refresh entry from
IDLE
Self-refresh exit
Power-down entry
Power-down exit
Mode register set
High level
Low level
High level or low level (either is acceptable)
Valid data
Supported DDR-SDRAM Commands
Symbol
DESL
NOP
READ
WRITE
ACT
PRE
PREALL
REFA
REFS
REFSX
PWRDN
PWRDNX
MRS/
EMRS
CKEn − 1 CKEn CS
H
H
H
H
H
H
H
H
H
H
H
L
H
L
H
X
X
X
X
X
X
X
X
X
H
L
H
L
H
X
H
L
L
L
L
L
L
L
L
L
L
H
H
H
L
RAS
H
H
H
H
H
L
L
L
L
L
X
X
X
L
X
CAS
X
H
L
L
L
L
H
H
H
L
L
X
X
X
L
WE
X
H
H
H
L
L
H
L
L
H
H
X
X
X
L
MA13
to
MA11
V
V
V
V
X
X
X
V
X
X
V
X
X
X
X
AP
(MA10)
X
X
L
H
L
H
V
L
H
X
X
X
X
X
V
BA1
and
BA0
X
X
V
V
V
V
V
V
X
X
X
X
X
X
V
X
MA9 to
MA0
X
X
V
V
V
V
V
X
X
X
X
X
X
V