Patent ID: 7516262

Claim:
A data transfer apparatus comprising: (A) a first portion in an externally-writable data storing area configured to store a first size of data to be relayed from a target device on a primary bus to a master device on a secondary bus; (B) a second portion in the externally-writable data storing area configured to store a second size of data to be relayed from a target device on the secondary bus to a master device on the primary bus; (C) a first data storage: (D) a second data storage; (E) a primary bus master block configured to read data from a target device on the primary bus and write the data into the first data storage while occupying the primary bus until the size of data stored in the first data storage reaches the first size of data; and (F) a secondary bus master block configured to read data from a target device on the secondary bus and write the data into the second data storage while occupying the secondary bus until the size of data stored in the second data storage reaches the second size of data.