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CRT9006-135 Datasheet Single Row Buffer

Manufacturer: SMSC (now Microchip Technology)

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General Description

The SMC Single Row Buffer (SRB) provides a low cost solution to memory contention between the system processor and CRT controller in video display systems.

The SRB is a RAM-based buffer which is loaded with character data from system memory during the first scan line of each data row.

While data is being written into the RAM it is also being output through the multiplexer onto the Data Ouput (DOUT) Lines.

Overview

STANDARD MICROSYSTEMS CORPORATIONAt CRT 9006-135 CRT 9006-83 J.

Key Features

  • D Low Cost Solution to CRT Memory Contention Problem D Provides Enhanced Processor Throughput for CRT Display Systems D Provides 8 Bit Wide Variable Length Serial Memory D Permits Active Video on All Scan Lines of Data Row D Dynamically Variable Number of Characters per Data Row- 64,80, 132, up to a Maximum of 135 D Cascadable for Data Rows Greater than 135 Characters D Stackable for Invisible Attributes or Character Widths of Greater than 8 Bits D Three-State Outputs D 4MHz Typical Read/Writ.

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