saa5700 NXP Semiconductors, saa5700 Datasheet - Page 15

• Manufacturer Part Number: saa5700
• Description: Chinese Character System Teletext Ccst Decoder
• Manufacturer: NXP Semiconductors

Philips Semiconductors
DRAM Interface timing (see note 1 and Fig.4)
Note
1. Based on a display clock frequency of 24 MHz, maximum 24 MHz + 500 ppm.
1997 May 16
T
t
t
t
t
T
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
pch(RAS)
h(CAS)
d(RAS-CAS)
WL(CAS)
pch(CAS)
h(CAS-RAS)
pch(CAS-RAS)
su(RA)
h(RA)
su(CA)
h(CA)
su(R)
h(R)(CAS)
h(R)(RAS)
su(W)
h(W)
su(i)(D)
h(i)(D)
ACC(R)(CAS)
ACC(R)(RAS)
cy(RAS)
cy(CAS)
Chinese Character System Teletext
(CCST) decoder
SYMBOL
RAS cycle time
RAS precharge time
CAS hold time
RAS to CAS delay time
CAS pulse width LOW
CAS page mode cycle time
CAS precharge time
RAS hold time after CAS
CAS to RAS precharge time
row address set-up time
row address hold time
column address set-up time
column address hold time
read command set-up time
read command hold time from (CAS)
read command hold time from (RAS)
write command set-up time
write command hold time
data input set-up time
data input hold time
read access time from (CAS)
read access time from (RAS)
PARAMETER
15
60
80
20
20
50
10
20
10
0
10
0
15
0
0
10
0
15
0
15
MIN.
375
TYP.
Preliminary specification
20
80
MAX.
SAA5700
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
UNIT