DP8522AV-25 National Semiconductor, DP8522AV-25 Datasheet - Page 15

• 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
In Figures 9a and 9b where the DP8520A 21A 22A operate in the refresh request acknowledge mode the RFIP output pin functions as RFRQ
An RFIP timing waveform is included in the figure solely for the purpose of simplifying the diagrams
FIGURE 9b Automatic Internal Refresh with Refresh Request (3T of RAS low during refresh programmed)
FIGURE 9a Externally Controlled Single and Burst Refresh with Refresh Request (RFRQ) Output
FIGURE 8 External Burst Refresh (2 Periods of RAS Precharge
2 Periods of Refresh RAS Low during Refresh Programmed)
(Continued)
(2 Periods of RAS Low during Refresh Programmed)
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