tc59lm814 TOSHIBA Semiconductor CORPORATION, tc59lm814 Datasheet - Page 28

• Manufacturer Part Number: tc59lm814
• Description: 256mbits Network Fcram1
• Manufacturer: TOSHIBA Semiconductor CORPORATION

POWER DOWN TIMING (CL = 4)
Write cycle to Power Down Mode
Command
BL = 4
BL = 2
(Input)
(Input)
(Input)
(Input)
DQS
DQS
CLK
CLK
DQ
DQ
PD
Note: “×” is don’t care
WRA
0
PD must be kept "High" level until WL+2 clock cycles from LAL command.
PD should be brought to high within t
LAL
1
Hi-Z
Hi-Z
Hi-Z
Hi-Z
2
WL=3
3
D0 D1 D2 D3
D0 D1
4
DESL
2 clock cycles
5
REFI(max)
6
Power Down Entry
t
IH
to maintain the data written into cell.
t
IS
7
I
PD
Hi-Z
Hi-Z
= 1 cycle
Hi-Z
Hi-Z
TC59LM814/06CTG-50,-60
8
l
RC(min),
9
×
t
REFI(max)
n − 1
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Power Down Exit
n
t
PDEX
I
PDA
DESL
n + 1
Rev 1.2
= 1 cycle
WRA
RDA
n + 2
or