SH7764 Datasheet, PDF (380/1752 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 11 Memory Controller Unit (MCU)
Table 11.17 shows the supported commands for SDRAM.
Table 11.17 Supported Commands for SDRAM
Pin
Function
CKE CKE
A
A
A
Symbol n-1 n
CSn RAS CAS R/W [14:13] [12:11] [10]
Device deselect DESL H ×
H×
×
×
×
×
×
No operation NOP H ×
L
HHH×
×
×
Read
READ H ×
L HL HV
V
L
Read with auto READA H ×
L HL HV
V
H
precharge
Write
WRITE H ×
L HL L V
V
L
Write with auto WRITEA H ×
L HL L V
V
H
precharge
Bank activate ACT H ×
L L HHV
V
V
Precharge select PRE H ×
L
L
HL
×
×
L
bank
Precharge select PALL H ×
L
L
HL
×
×
H
all bank
Auto refresh
CBR H
H
L
L
L
H×
×
×
Self-refresh
SLFRSH H
L
L
L
L
H×
×
×
entry from IDLE
Self-refresh
SLFRSHX L
H
H×
×
×
×
×
×
entry exit
Power-down PWRDN H L
H×
×
×
×
×
×
entry
Power-down exit PWRDNX L
H
H×
×
×
×
×
×
Mode register MRS H ×
LLLLV
V
V
set
A
[9:0]
×
×
V
V
V
V
V
×
×
×
×
×
×
×
V
Rev. 1.00 Nov. 22, 2007 Page 324 of 1692
REJ09B0360-0100