DP8406 - 32-Bit Parallel Error Detection and Correction Circuit
Description
The DP8406 device is a 32-bit parallel error detection and correction circuit (EDAC) in a 52-pin or 68-pin package The EDAC uses a modified Hamming code to generate a 7-bit check word from a 32-bit data word This check word is stored along with the data word during the memory write cycle During the
Features
Y Y Y Y Y Y Y
Detects and corrects single-bit errors Detects and flags dual-bit errors Built-in diagnostic capability Fast write and read cycle processing times Byte-write capability Guaranteed 4000V minimum ESD protection Fully pin and function compatible with SN74ALS632A thru SN74ALS635 series
TI’s
Simplified Functional Block
TL F 9579.
9
Device DP8406 DP8406
Package 52-Pin 68-Pin
Byte-Write yes yes
Output TRI-STATE TRI-STATE
FAST and TRI-STATE are registered trademarks of Na.
DP8406 (54F 74F632) 32-Bit Parallel Error Detection and Correction Circuit
May 1991
DP8406 (54F 74F632) 32-Bit Parallel Error Detection and Correction Circuit
General Description
The DP8406 device is a 32-bit parallel error detection and correction circuit (EDAC) in a 52-pin or 68-pin package The EDAC uses a modified Hamming code to generate a 7-bit check word from a 32-bit data word This check word is stored along with the data word during the memory write cycle During the memory read cycle the 39-bit words from memory are processed by the EDAC to determine if errors have occurred in memory Single-bit errors in the 32-bit data word are flagged and corrected Single-bit errors in the 7-bit check word are flagged and the CPU sends the EDAC through the correction cycle even though the 32-bi
DP8406 Datasheet
