公开(公告)号：JP2000322312A

公开(公告)日：2000-11-24

申请号：JP12186899

申请日：1999-04-28

Applicant: IBM

Inventor： KATO MIHARU ,  FUNADOGAWA KAZUO ,  OGATA MASANOBU

IPC: G06F3/12 ,  G06F12/00 ,  G06F13/00

Abstract: PROBLEM TO BE SOLVED: To sharply reduce the frequency of memory access such as picture printing processing. SOLUTION: When a CPU 100 reads picture data from a buffer block in which any data are never written, a memory controller 12 returns preliminarily stored initial data without reading any picture data from a picture buffer 140. At the time of writing the picture data in the buffer block for the first time, the memory controller 12 stores and manages the data, and writes the initial data in the buffer block, and then writes the picture data. When a reading or writing request is issued to a buffer block in which any data are written once, the memory controller 12 operates the reading or writing of data as requested.

公开(公告)号：JP2003086698A

公开(公告)日：2003-03-20

申请号：JP2001279192

申请日：2001-09-14

Applicant: IBM

Inventor： NOZAWA TORU ,  KATO MIHARU

IPC: G06K19/07 ,  H01L21/822 ,  H01L27/04 ,  H01Q1/38 ,  H05K1/02 ,  H05K1/18

Abstract: PROBLEM TO BE SOLVED: To reduce the size of an IC chip and increase the degree of freedom of a position of the IC chip on a substrate. SOLUTION: A wireless unit 19 for inputting and outputting data by wireless communication is formed in the IC chip together with a logic part 12. As a result, pads for a power source and ground only are left on the IC chip 16, and an I/O pad becomes unnecessary. ICs including the IC chip 16 to each other input and output data not by wires but by the wireless communication, so that the degree of freedom of a position of each IC on the substrate is increased.