Browse Prior Art Database

Multiple Identifier Detection Method with Power Management

IP.com Disclosure Number: IPCOM000118660D
Original Publication Date: 1997-May-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 4 page(s) / 57K

Publishing Venue

IBM

Related People

Horikoshi, H: AUTHOR

Abstract

Disclosed is a device for detecting a multiple Identifier (ID) with an efficient power management. This device requires less ID signal lines and less power dissipation to detect more IDs than the conventional ID detection device.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 75% of the total text.

Multiple Identifier Detection Method with Power Management

      Disclosed is a device for detecting a multiple Identifier (ID)
with an efficient power management.  This device requires less ID
signal lines and less power dissipation to detect more IDs than the
conventional ID detection device.

      Each ID is detected by each analog level voltage.  The system
gets the digital ID by way of an Analog/Digital (A/D) converter.

      Fig. 1 shows a block diagram that embodies this invention.
VccID and V(LCD) are the key elements to configure the invention.
VccID is the power source to sense V(Ln) which is the voltage level
of a Liquid Crystal Display (LCD) panel.  The character "n" means the
number of LCD IDs assigned.
  V(LCD1) = (VccID/n) x 1 = Voltage level of LCD panel ID1
  V(LCD2) = (VccID/n) x 2 = Voltage level of LCD panel ID2
  V(LCD3) = (VccID/n) x 3 = Voltage level of LCD panel ID3
    .         .
    .         .
    .         .
    V(LCDn) = (VccID/n) x n = Voltage level of LCD panel IDn

This means that dividing the VccID voltage level by the number of IDs
enables to assign multiple IDs.

      Fig. 2 is the flow chart that shows how power is controlled and
ID is read.  VccID is turned on just before reading ID.  After
reading ID, VccID will be turned off to save power.

      Fig. 3 shows a case of the multiple ID detection for other
commodities such as a CPU card, a memory card and a battery,
inclu...