CS98100 Cirrus Logic, Inc., CS98100 Datasheet - Page 8

• Manufacturer Part Number: CS98100
• Description: DVD Video Processor With Progressive Scan
• Manufacturer: Cirrus Logic, Inc.

1.2.2
The CS98100 interfaces with either SDRAM or SGRAM, for high data bandwidth transfer.
Table 2
Figure 3
action. In both
8
DR_RAS_N
DR_CAS_N
DR_D[31:0]
DR_DQM_[3:0]
DR_CKO
DR_A[11:0]
DR_BS_N
DR_WE_N
DR_AP
show the interface pin timing.
shows a burst read (length = 8) transaction, while
SDRAM Interface
tmco
tmper
tmdow
tmhw
tmsur
tmsurd
tmhr
tmhrd
Symbol
1.
Figure 3
1
Delay is programmable by selecting the DRAM_Input_Speed bit of the Command Register(0x000)
1
1
1
Output Delay from DR_CKO active edge
DR_CKO Period
DR_D[31:0] delay from DR_CKO
DR_D[31:0] valid time after DR_CKO
DR_D[31:0] setup to DR_CKO
DR_D[31:0] setup to DR_CKO with delay 4.3
DR_D[31:0] hold time after DR_CKO
DR_D[31:0] hold time after DR_CKO with
delay
and
Figure
Figure 2. SDRAM Refresh Transaction
Table 2. SDRAM Interface Characteristics
4, CAS latency is programmed to 3.
Description
Figure 2
shows the refresh cycle performed by the CS98100.
Figure 4
11
1.5
3.9
0.5
0
Min
shows a burst write (length=8) trans-
12.2
Typ
9
9
Max
ns
ns
ns
ns
ns
ns
ns
ns
Unit
CS98100
Figure 5
and