Rochester Electronics 29C60APC

The AM29C60A Error Detection and Correction (EDC) unit contains the necessary logic to generate check bits over a 16-bit data field based on a modified Hamming code, and to correct data words when check bits are provided. When operating on data read from memory, the AM29C60A can correct any single-bit error and detect all double-bit and some triple-bit errors. For a 16-bit word, 6 check bits are used. The AM29C60A is expandable to handle 32-bit words (7 check bits) and 64-bit words (8 check bits). In all configurations, the device provides error syndromes on separate outputs for data logging. In addition, the AM29C60A features two diagnostic modes that force diagnostic data into sections of the chip to simplify device testing and perform system diagnostic functions.

• Enhanced memory reliability. Corrects all single-bit errors and detects all double-bit and partial triple-bit errors, improving dynamic RAM system reliability by more than sixty times.
• High speed, low power. Ideal for MOS microprocessors, minicomputers, mainframe systems, and engineering workstations. High-performance systems can use the AM29C60 EDC in check-only mode to avoid slowing down the memory system.
• Handles data words from 8 to 64 bits. AM29C60A EDC is cascadable: one EDC for 8-bit or 16-bit, two for 32-bit, and four for 64-bit.
• Easy byte manipulation. Independent byte enable on data output latches simplifies operations and reduces the time required for byte writes.
• Built-in diagnostic capability. The processor can fully test the EDC under software control to verify proper operation.
• Compatible with bipolar Am2960 series.

• MOS microprocessors
• Minicomputers
• Mainframe systems
• Engineering workstations