Integrated circuit with associated memory function
View Patent ↗A search payload data shift part has n latch parts LT 1 to LTn (n≧2), each of which can store 1-byte latch data, and obtains search payload data having an n-byte length, while shifting payload data inputted from an input terminal, in synchronization with a clock provided from the exterior. Data related to the search payload data is given to a CAM array, as search object data. When the search object data matches entry data of the CAM array, a hit signal ‘hit’ indicating a match is outputted from the CAM array.
1. An integrated circuit with associated memory function comprising:
a payload data shift part for receiving input data containing payload data and fetching said payload data in a predetermined bit unit to obtain search payload data composed of the product of a predetermined bit of the predetermined bit unit and a predetermined length while shifting said payload data in said predetermined bit unit; and
an associated memory part for storing at least one entry data and outputting a comparison result signal indicating the presence or absence of a match by comparing search object data being data related to said search payload data with said at least one entry data.
2. The integrated circuit with associated memory function according to claim 1 , wherein
said input data further contains header data,
said integrated circuit further comprising:
a search data combining part for obtaining combined search data by combining said head data and said search payload data; and
a search data mask part for obtaining said search object data by selectively causing said combined search data to be valid.
3. The integrated circuit with associated memory function according to claim 1 , wherein
said comparison result signal contains offset information indicating the shift status of said search payload data.
4. The integrated circuit with associated memory function according to claim 2 , wherein
said comparison result signal contains offset information indicating the shift status of said search payload data.