PD488588FF Datasheet, PDF (51/79 Pages) Elpida Memory – 288M bits Direct Rambus DRAM for High Performance Solution

µPD488588FF-C80-40
Figure 23-4 NAP and PDN Exit
T₀ T₁ T₂ T₃ T₄ T₅ T₆ T₇ T₈ T₉ T₁₀ T₁₁T₁₂T₁₃ T₁₄ T₁₅ T₁₆T₁₇ T₁₈ T₁₉ T₂₀T₂₁ T₂₂ T₂₃ T₂₄T₂₅ T₂₆ T₂₇T₂₈T₂₉ T₃₀ T₃₁ T₃₂T₃₃ T₃₄ T₃₅ T₃₆T₃₇ T₃₈ T₃₉ T₄₀T₄₁ T₄₂ T₄₃T₄₄T₄₅ T₄₆ T₄₇
CTM/CFM
ROW2
..ROW0
COL4
..COL0
DQA8..0
DQB8..0
SCK
If PSX=1 in Init register,
then NAP/PDN exit is
broadcast (no PDEV field).
t_S3 t_H3 t_S3 t_H3
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
t_CE
Note 2
Note 2
PDEV5..0 PDEV5..0
DQS=0 ^Not_D^{e 2}_Q^,3_S=1Note 2
ROP ^restricted ROP
COP
XOP
t_S4 t_H4
restricted
t_S4 t_H4
COP
XOP
CMD
01
SIO0
SIO1
Note 1
0/1
The packet is repeated
from SIO0 to SIO1
Note 1
0/1
Effective hold becomes
tH4’ = tH4 +[PDNXA•64•tSCYCLE + tPDNXB,MAX] - [PDNX•256•tSCYCLE]
if [PDNX•256•tSCYCLE] < [PDNXA•64•tSCYCLE + tPDNXB,MAX].
Power
State
NAP/PDN
(NAPX•t_SCYCLE)/(256•PDNX•t _SCYCLE)
STBY/ATTN ^{Note 4}
Note 2
Note 2
DQS=0 DQS=1
Notes 1. Use 0 for NAP exit, 1 for PDN exit
2. Device selection timing slot is selected by DQS field of NAPX register
3. The DQS field must be written with “1” for this RDRAM.
4. Exit to STBY or ATTN depends upon whether RLXR was asserted at NAP or PDN entry time
Figure 23-5 NAP Entry/Exit Windows (left) and PDN Entry/Exit Windows (right)
T₀ T₁ T₂ T₃ T₄ T₅ T₆ T₇ T₈ T₉ T₁₀ T₁₁T₁₂T₁₃ T₁₄ T₁₅ T₁₆T₁₇ T₁₈ T₁₉ T₂₀T₂₁ T₂₂ T₂₃ T₂₄T₂₅ T₂₆ T₂₇T₀ T₁ T₂ T₃ T₄ T₅ T₆ T₇ T₈ T₉ T₁₀ T₁₁ T₁₂T₁₃ T₁₄ T₁₅T₁₆T₁₇ T₁₈ T₁₉
CTM/CFM
ROW2
..ROW0
NAP entry
NAPR
CTM/CFM
ROW2
..ROW0
PDN entry
PDNR
SCK
SCK
CMD
NAP exit
01
t_NU0
t_NU1
no entry to NAP or PDN no exit
0 1 CMD
PDN exit
01
0
t_PU0
t_PU1
no entry to NAP or PDN no exit
t_NU0 =5•t CYCLE +(2+NAPX)•t SCYCLE
t NU1 =8•t CYCLE - (0.5•t _SCYCLE ) if NSR=0
=23•t_CYCLE
if NSR=1
t_PU0 =5•t CYCLE +(2+256•PDNX)•t_SCYCLE
t _PU1 =8•t _CYCLE - (0.5•t _SCYCLE )
if PSR=0
=23•t CYCLE
if PSR=1
Data Sheet E0251N20 (Ver. 2.0)
51