STV-DCA/VGA-E01 STMICROELECTRONICS [STMicroelectronics], STV-DCA/VGA-E01 Datasheet - Page 19

• Manufacturer Part Number: STV-DCA/VGA-E01
• Description: Low Cost Digital Camera (LCDC) Chipset
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

STV0680A + VV6444/6410/6500
4.3.3
The SDRAM refresh period from STV0680A is guaranteed to be no greater than 15.6 S during ‘Snapshot’/self-timer/continuous/
tethered video modes of operation (i.e. not standby mode). In standby mode, the SDRAM is set to self-refresh, therefore no
19
STV0680F_contents.fm
Command
A0-9,BA
A10
DQM
DQ
DCLK
C KE
SDRAM refresh Period
Symbol
t
t
t
t
t
CK
CMH
t
t
CMS
CMS
AS
t
t
t
t
CH
OH
CK
CL
AC
AS
ACTIVE
ROW
ROW
t
CMH
t
AH
166.45
82.88
82.85
82.88
Figure 3 : SDRAM Write Timing (16Mbit device, burst write)
Figure 2 : SDRAM Read Timing (16Mbit device, burst read)
t
Min
R C D
½
½
0
t
CMS
t
L
Table 7 : Timing parameters for SDRAM read/write
DIN M
WRITE
166.89
Max
t
H
½
DIN M + 1
Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000
Commercial in confidence
Units
t
t
t
ns
ns
ns
ns
ns
CK
CK
CK
CDSTV0680F-C
PRELIMINARY
t
R A S
t
D S
DIN M + 2
COLUMN
NOP
t
D H
Symbol
t
t
t
t
t
RCD
t
RCD
RAS
t
t
DH
RC
DS
RP
AH
t
R C
DIN M + 3
81.01
83.41
82.76
t
Min
CMH
1
5
7
2
1
PRECHARGE
Max
5
Units
t
t
t
t
t
ns
ns
ns
CK
CK
CK
CK
CK
NOP
t
R P