hm5216805 Renesas Electronics Corporation., hm5216805 Datasheet - Page 45

• Manufacturer Part Number: hm5216805
• Description: 16 M Lvttl Interface Sdram 100 Mhz/83 Mhz 1-mword 8-bit 2-bank/2-mword 4-bit 2-bank - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

Relationship Between Frequency and Minimum Latency
Parameter
Frequency (MHz)
t
Active command to column command (same
bank)
Active command to active command (same
bank)
Active command to precharge command
(same bank)
Precharge command to active command
(same bank)
Write recovery or data-in to precharge
command (same bank)
Active command to active command
(different bank)
Self refresh exit time
Last data in to active command
(Auto precharge, same bank)
Self refresh exit to command input
Precharge command to high impedance
(CAS latency = 3)
Last data out to active command (auto
precharge) (same bank)
Last data out to precharge (early precharge)
(CAS latency = 3)
Column command to column command
Write command to data in latency
DQM to data in
DQM to data out
CKE to CLK disable
CK
(CAS latency = 2)
(CAS latency = 1)
(CAS latency = 2)
(CAS latency = 1)
(ns)
Symbol
t
t
t
t
t
t
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
RCD
RC
RAS
RP
DPL
RRD
SREX
APW
SEC
HZP
HZP
HZP
APR
EP
EP
EP
CCD
WCD
DID
DOD
CLE
HM5216805 Series, HM5216405 Series
HM5216805/HM5216405
-10H
100
10
3
9
6
3
2
2
2
5
9
3
—
—
1
–2
—
—
1
0
0
2
1
66
15
2
6
4
2
1
2
2
3
6
3
2
—
1
–2
–1
—
1
0
0
2
1
33
30
1
3
2
1
1
1
2
2
3
3
2
1
1
–2
–1
0
1
0
0
2
1
-12
83
12
3
9
6
3
2
2
2
5
9
3
—
—
1
–2
—
—
1
0
0
2
1
55
18
2
6
4
2
1
2
2
3
6
3
2
—
1
–2
–1
—
1
0
0
2
1
28
36
1
3
2
1
1
1
2
2
3
3
2
1
1
–2
–1
0
1
0
0
2
1
Notes
1
= [t
1
1
1
1
1
2
= [t
= [t
RAS
DPL
RC
]
+ t
+ t
RP
RP
45
]
]