R8A20210BG View Datasheet(PDF) - Renesas Electronics

Part Name

Description

Manufacturer

R8A20210BG

Network Address Search Engine (9 M/18 M-bit Full Ternary CAM)

Renesas Electronics 

R8A20211BG/R8A20210BG (MARIE_Blade)

11. Parity Bit Check

MARIE_Blade provides an error check function using parity bits. Soft error can be detected with upper 2 bits in

each DQ entry (72-bit lookup) as the parity bit. If Status Set Register (ST) is set to allow the error check, Parity Bit

Check is automatically operated during Read TCAM.

Once any error is found, the error flag goes high and retrieved data is input. Go through the following steps to

provide the parity bit for 72-bit entry.

>> DQ [70] … Set even bits in DQ [69:0] to be even parity

>> DQ [71] … Set odd bits in DQ [69:0] to be even parity

Note that MARIE_Blade supports neither Error Check & Correct nor Parity Bit Generation.

Rev.1.00 Feb 21, 2005 page 7 of 14

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