DP8522AV-25 National Semiconductor, DP8522AV-25 Datasheet - Page 31

• Manufacturer Part Number: DP8522AV-25
• Description: IC CTRLR 4M VRAM 25MHZ 68PLCC
• Manufacturer: National Semiconductor

Specifications of DP8522AV-25

• Controller Type: Video RAM Controller, Drivers
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 68-LCC (J-Lead)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Supply: -
• Voltage - Supply: -
• Interface: -
• Other names: *DP8522AV-25

7 0 Additional Access Support Features
7 3 DELAY CAS DURING WRITE ACCESSES
Address bit C9 asserted during programming will cause CAS
to be delayed until the first positive edge of CLK after RAS
is asserted when the input WIN is asserted Delaying CAS
during write accesses ensures that the data to be written to
FIGURE 34 Mode 0 Delay CAS
FIGURE 35 Mode 1 Delay CAS
31
34 and 35 If the possibility exists that data still may not be
VRAM will be setup to CAS asserting as shown in Figures
present after the first positive edge of CLK CAS can be
delayed further with the ECAS inputs If address bit C9 is
negated during programming read and write accesses will
be treated the same (with regard to CAS)
TL F 9338 – 85
TL F 9338 – 86