Sharp Kabushiki Kaisha Corporation

Yutaka Iizuka

Toshihiko Yoshida

Akira Tanimoto

Satoshi Tominaga

Masato Takemoto

Toshiyuki Itoga

Takashi Tatsumi

Mikio Higashiyama

Shinji Okamoto

Susumu Genba

Toshiro Kita

Kinya Morinouchi

When the contents of a flash ROM which is an electrically rewritable nonvolatile memory are rewritten, after an IPL program for rewriting stored in the flash ROM is transferred to a RAM, mapping of memory space is switched by a switching control circuit. The IPL program transferred to the RAM is protected. The contents of the flash ROM are erased by use of the IPL program, and an updated program supplied through an RS-232C interface is written into the flash ROM. When a bug is caused due to static electricity in the IPL program stored in the flash ROM, an EPROM which is a nonvolatile memory element is attached, an IPL program stored in the EPROM is executed, and the IPL program stored in the EPROM is directly transferred to the flash ROM.

Computer apparatus having electrically rewritable nonvolatile memory,

An image processing device for controlling data transfer includes an image scanner, an image printer, a facsimile control unit, bus lines for data transfer, a bidirectional parallel interface unit, and a main CPU in a housing. The device is connected to an external data processing device through the parallel interface unit. In addition to the functions which are obtained independent from the external data processing device, the image processing device realizes various kinds of functions by controlling the image scanner, the image printer facsimile control unit and the interface unit by the main CPU in response to commands from the data processing device. As a result, various kinds of image processing functions are carried out.

Image processing device of multifunctional type

Growing community of inventors

Yamatokoriyama, Japan

Yutaka Iizuka