k4r881869m Samsung Semiconductor, Inc., k4r881869m Datasheet - Page 43

• Manufacturer Part Number: k4r881869m
• Description: 288mbit Rdram 512k X 18 Bit X 2*16 Dependent Banks Direct Rdramtm
• Manufacturer: Samsung Semiconductor, Inc.

K4R881869M
a
b
t
t
CTM/CFM
COL4
DQA8..0
Power
CTM/CFM
DQB8..0
CMD
ROW2
SCK
ROW2
NU0
NU1
SIO0
SIO1
State
Use 0 for NAP exit, 1 for PDN exit
Device selection timing slot is selected by DQS field of NAPX register
..COL0
CMD
..ROW0
..ROW0
SCK
= 5•t
= 8•t
= 23•t
CYCLE
CYCLE
CYCLE
T
The packet is repeated
T
+ (2+NAPX)•t
- (0.5•t
0
0
from SIO0 to SIO1
T
T
NAP/PDN
1
1
Figure 49: NAP Entry/Exit Windows (left) and PDN Entry/Exit Windows (right)
T
T
2
2
SCYCLE
t
no entry to NAP or PDN
T
T
CE
3
3
If PSX=1 in Init register, then
NAP/PDN exit is broadcast
(no PDEV field).
T
T
0/1
0/1
NAP exit
4
4
0
0
T
T
t
a
a
PDEV5..0
5
5
SCYCLE
)
S3
T
T
6
6
1
1
T
T
DQS=0
t
DQS=0
7
7
H3
t
T
T
b
NU0
8
8
if NSR=0
if NSR=1
T
T
t
PDEV5..0
9
9
S3
b,c
b
T
T
10
10
T
T
t
DQS=1
11
11
DQS=1
H3
T
T
b
12
12
NAP entry
T
T
13
13
Figure 48: NAP and PDN Exit
NAPR
b
T
b
T
14
14
Effective hold becomes
t
if [PDNX•256•t
H4
(
no exit
T
T
t
NAPX)•t
15
15
NU1
’=t
T
T
16
H4
16
T
T
+[PDNXA•64•t
17
17
T
T
18
18
SCYCLE
0
T
T
19
19
Page 41
No ROW packets may
overlap the restricted interval
No COL packets may
overlap the restricted interval
if device PDEV is exiting the
NAP-A or PDN-A states
SCYCLE
T
T
20
20
1
T
T
)/(
CTM/CFM
21
21
ROW2
] < [PDNXA•64•t
T
T
CMD
..ROW0
SCYCLE
SCK
22
256•PDNX•t
22
T
T
23
23
d
T
Exit to STBY or ATTN depends upon whether RLXR was
24
c
asserted at NAP or PDN entry time
+t
T
The DQS field must be written with “1“ for this RDRAM.
25
PDNXB,MAX
T
26
STBY/ATTN
T
SCYCLE
27
T
SCYCLE
T
0
28
T
1
T
]-[PDNX•256•t
29
T
t
t
2
T
)
PU0
PU1
+t
30
T
no entry to NAP or PDN
PDNXB,MAX
3
T
31
T
PDN exit
= 5•t
= 8•t
= 23•t
4
T
0
32
T
5
T
d
33
CYCLE
CYCLE
T
6
CYCLE
T
SCYCLE
1
34
T
].
7
T
35
t
Preliminary
Direct RDRAM
T
Rev. 0.9 Jan. 2000
PU0
T
ROP
8
+ (2+256•PDNX)•t
COP
- (0.5•t
XOP
36
T
]
9
T
37
T
10
T
38
T
SCYCLE
11
T
t
t
39
T
restricted
restricted
S4
S4
12
T
PDN entry
40
T
13
T
t
t
PDNR
41
T
)
H4
H4
14
no exit
T
t
42
T
PU1
15
SCYCLE
T
43
T
T
16
ROP
COP
XOP
44
T
if PSR=0
if PSR=1
17
T
45
T
18
T
46
0
T
19
T
47
T
™
20
1
T
21