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1. (WO2001025016) RECORDER, SEMICONDUCTOR DEVICE, AND RECORDING HEAD DEVICE

Pub. No.:    WO/2001/025016    International Application No.:    PCT/JP2000/006906
Publication Date: Apr 12, 2001 International Filing Date: Oct 4, 2000
IPC: B41J 2/175
Applicants: SEIKO EPSON CORPORATION

TSUJI, Ryuichi

Inventors: TSUJI, Ryuichi

Title: RECORDER, SEMICONDUCTOR DEVICE, AND RECORDING HEAD DEVICE
Abstract:
A device body control unit (2) communicates data through serial data communication with a memory access control unit (3). The memory access control unit (3) reads various information (such as on the amount of ink remaining and the use start date) stored in nonvolatile memories (4, 5) and stores it in a RAM in the memory access control unit (3). The device body control unit (2) issues a RAM access request command to read and update the information. When the printer is turned off, the device body control unit (2) issues an information write-back command. The memory access control unit (3) writes back the information in the RAM into the nonvolatile memories (4, 5). Since data is thus written/read in/from the nonvolatile memories (4, 5) through the memory access control unit (3), the burden on the device body control unit (2) when the nonvolatile memories (4, 5) are accessed is lightened.