CS98000 Cirrus Logic, Inc., CS98000 Datasheet - Page 8
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CS98000
Manufacturer Part Number
CS98000
Description
DVD Video Processor
Manufacturer
Cirrus Logic, Inc.
Datasheet
1.CS98000.pdf
(48 pages)
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1.2.2
CS98000 interfaces with either SDRAM or SGRAM for high data bandwidth transfer.
refresh cycle performed by CS98000.
page 9
terface timing. In both
8
t
t
t
t
t
t
t
t
t
msur
mhr
mco
cch
ccl
mper
mhw
mdow
msuw
1.
Values are guaranteed by design only.
Symbol
shows a burst read (length = 8) transaction, while
SDRAM Interface
M_DQM_[3:0]
M_RAS_N
M_D_[31:0]
M_A_[11:0]
M_CAS_N
M_WE_N
M_BS_N
M_DQM_[3:0]
M_D[31:0] setup to M_CKO
M_D[31:0] hold time after M_CKO
M_CKO active edge to Output transition
M_CKO high time
M_CKO low time
M_CKO Period
M_D[31:0] valid time after M_CKO
M_D[31:0] delay from M_CKO rising edge
M_D[31:0] valid time prior to M_CKO
Table 2. SDRAM Interface Symbols and Characterization Data
M_RAS_N
M_CAS_N
M_CKO
M_WE_N
M_A_[11:0]
Figure 3
M_AP
M_BS_N
MD[31:0]
M_CKE
M_AP
Figure 3. SDRAM Burst Write Transaction
and
Figure 2. SDRAM Refresh Transaction
R0
1
Figure
Description
Figure 3
C0
4, CAS latency is programmed to 3.
D0
shows a burst write (length = 8) transaction.
D1
C1
C2
D2
C3
D3
Figure 5 on page 9
C4
D4
D5
C5
D6
C6
Min
4.5
4.5
10
3
1
5
4
D7
C7
shows detailed SDRAM in-
12.5
Typ
Figure 2
Max
7
5
CS98000
Figure 4 on
shows the
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns