Invention Grant
- Patent Title: Method and apparatus for scanning a key or button matrix
- Patent Title (中): 用于扫描键或按钮矩阵的方法和装置
-
Application No.: US11613946Application Date: 2006-12-20
-
Publication No.: US07612690B2Publication Date: 2009-11-03
- Inventor: David G. Wright , Ray Asbury
- Applicant: David G. Wright , Ray Asbury
- Applicant Address: US CA San Jose
- Assignee: Cypress Semiconductor Corporation
- Current Assignee: Cypress Semiconductor Corporation
- Current Assignee Address: US CA San Jose
- Main IPC: H03M11/00
- IPC: H03M11/00
Abstract:
An improved key matrix scanning technique conducts a first pre-scan on a first array of connections in a key matrix to identify any activated keys or buttons associated with the first array. A second sub-scan is conducted on a second array of connections in the key matrix but only for the connections in the first array that are detected as having activated keys.
Public/Granted literature
- US20070096949A1 METHOD AND APPARATUS FOR SCANNING A KEY OR BUTTON MATRIX Public/Granted day:2007-05-03
Information query
