hm5216805 Renesas Electronics Corporation., hm5216805 Datasheet - Page 46

• 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.

HM5216805 Series, HM5216405 Series
Relationship Between Frequency and Minimum Latency (cont)
Parameter
Frequency (MHz)
t
Register set to active command
CS to command disable
Power down exit to command input
Burst stop to output valid data hold (CAS
latency = 3)
Burst stop to output high impedance (CAS
latency = 3)
Burst stop to write data ignore
Notes: 1. t
46
CK
(CAS latency = 2)
(CAS latency = 1)
(ns)
(CAS latency = 2)
(CAS latency = 1)
2. When self refresh exit is executed, CKE should be kept “H” longer than l
RCD
to t
RRD
are recommended value.
Symbol
t
I
I
I
I
I
I
I
I
I
RSA
CDD
PEC
BSR
BSR
BSR
BSH
BSH
BSH
BSW
HM5216805/HM5216405
-10H
100
10
1
0
1
2
—
—
3
—
—
0
66
15
1
0
1
2
1
—
3
2
—
0
33
30
1
0
1
2
1
0
3
2
1
0
-12
83
12
1
0
1
2
—
—
3
—
—
0
SREX
55
18
1
0
1
2
1
—
3
2
—
0
from exit cycle.
28
36
1
0
1
2
1
0
3
2
1
0
Notes