LC78616PE Datasheet, PDF (22/26 Pages) ON Semiconductor – Compact Disc Player IC

LC78616PE
 SDRAM Refresh Timing (Auto Refresh)
SDCSB
SDCLK
TS14
TS5
TS6
1/FS1
SDCKE
TS5
TS6
SDRASB
SDCASB
SDWEB
DADD[13:0]
SDDQM
TS7
TS7
DDAT[15:0]
TS15
symbol
FS1
TS2
TS3
TS4
TS5
TS6
TS7
TS8
TS9
TS10
TS11
TS12
TS13
TS14
TS15
parameter
SDRAM clock(SDCLK) Frequency
Row(SDRASB) Cycle time
Row(SDRASB) Active time
RASB-CASB Delay time(SDRASB-SDCASB)
Command "L" level width
(SDCSB, SDCKE, SDRASB, SDCASB, SDWEB)
Command Setup time
(SDCSB, SDCKE, SDRASB, SDCASB, SDWEB,
SDDQMU, SDDQML)
Command Hold time
(SDCSB, SDCKE, SDRASB, SDCASB, SDWEB,
SDDQMU, SDDQML)
Address(DADD) Setup time
Address(DADD) Hold time
SDRAM Read Data Setup time
(Data read from SDRAM)
SDRAM Read Data Hold time
(Data read from SDRAM)
SDRAM Write Data Hold time
before rising edge of SDCLK
(Data write to SDRAM)
SDRAM Write Data Hold time
after rising edge of SDCLK
(Data write to SDRAM)
Row(SDRASB) Pre-charge time
Row(SDRASB) Active time after Refresh
Min
typ
max
16.9344
(1/FS1)×5


(1/FS1)×3


(1/FS1)×2


40


10


10


10


10


20


0


10


10


(1/FS1)×3


(1/FS1)×5


<Notes>
 Setup time and Hold time specifications in above table are measured from the rising edge of SDCLK signal.
 All the specifications in above table are applied to Read mode, Write mode and Refresh mode.
unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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