DP8522AV-25 National Semiconductor, DP8522AV-25 Datasheet - Page 14

• 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

4 0 Refresh Options
Explanation of Terms
RFRQ
RFSH
RFIP
ACIP
e
e
e
e
RFRQ has the ability to hold off a pending access
This means that either RAS is low for an access or is
in the process of transitioning low for an access
ReFresh ReQuest internal to the DP8520A 21A 22A
Externally requested ReFreSH
ReFresh In Progress
Port A or Port B (DP8522A only) ACcess In Progress
FIGURE 7b Single External Refresh (2 Periods of RAS Low during Refresh Programmed)
FIGURE 7a DP8520A 21A 22A Access Refresh Arbitration State Program
(Continued)
14
TL F 9338 – 10
TL F 9338– 11