tc59lm818dmg TOSHIBA Semiconductor CORPORATION, tc59lm818dmg Datasheet - Page 48

• Manufacturer Part Number: tc59lm818dmg
• Description: 288mbits Network Fcram2 ? 4,194,304-words ? 4 Banks ? 18-bits
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Unidirectional DS/Free Running QS mode
Unidirectional DS/Free Running QS mode
Command
Command
SELF-REFRESH ENTRY TIMING
SELF-REFRESH EXIT TIMING
(output)
(output)
(output)
(output)
CLK
CLK
CLK
CLK
DQ
DQ
PD
QS
PD
QS
Notes: 1.
Notes: 1.
I
RCD
Qx
*2
t
WRA
QPDH
t
Self-Refresh Exit
= 1 cycle
FPDL (min)
0
0
2.
3. It is desirable that clock input is continued at least l
4. In case of Self-Refresh entry after Write Operation, from the LAL command following WRA to the
Hi-Z
2. Clock should be stable prior to PD = “High” if clock input is suspended in Self-Refresh mode.
3. DESL command must be asserted during I
4. It is desirable that one Auto-Refresh command is issued just after Self-Refresh Exit before any
5. Any command (except Read command) can be issued after I
6. Read command (RDA + LAL) can be issued after I
7. QS output is invalid until DLL lock from Self-Refresh exit.
Refresh mode. When PD is brought to "Low" after l
and enter Power down mode. In case of PD fall between t
will either entry Self-Refresh mode or Power down mode after Auto-Refresh operation. It can’t be
specified which mode TC59LM818DMG operates.
brought to “Low” for Self-Refresh Entry.
REF command delay time is Write latency(WL)+2 clock cycles minimum.
other operation.
PD must be brought to "Low" within the timing between t
DESL
REF
t
1
1
PDEX
is don’t care.
is don’t care.
t
FPDL (max)
*3
I
REFC
2
2
Self Refresh Entry
WRA
m − 1
Auto Refresh
3
I
*4
RCD
I
REFC
I
I
PDV
REF
CKD
= 1 cycle
m
4
*2
*4
DESL
m + 1
I
5
LOCK
I
REFC
DESL
REFC
m − 1
m + 2
after PD is brought to “High”.
LOCK
CKD
PDV
from REF command even though PD is
.
, TC59LM818DMG perform Auto Refresh
n − 1
FPDL
m
FPDL
I
REFC
RCD
(min) and t
(max) and l
TC59LM818DMG-33,-40
Command (1st)
m + 1
= 1 cycle
.
n
Command (2nd)
FPDL
Hi-Z
Hi-Z
n + 1
PDV
(max) to Self
2005-10-19 48/57
, TC59LM818DMG
*5
RDA
p − 1
*6
*5
LAL
p
Rev 1.4
*6