| 摘要 |
PROBLEM TO BE SOLVED: To provide a data transfer controller, etc. by which higher efficiency of serial transfer is attained. SOLUTION: A link controller 100, when a read request packet for requesting to read a status of a vertical synchronizing signal is received, sets a first packet buffer 301 in a packet buffer for reception, sets a second packet buffer 302 in a packet buffer for transmission, reads a response packet or an acknowledge packet to the read request packet from the second packet buffer 302 and transmits it via a serial bus. When a write request packet is received after that, the link controller 100 sets the first and second packet buffers 301, 302 in the packet buffer for reception and outputs a command or data whose write is requested to an interface circuit 110 via either of the first and second packet buffers 301, 302. COPYRIGHT: (C)2007,JPO&INPIT
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