TW243505B - Device for keyboard scanning and detection of additional input and the process - Google Patents

Device for keyboard scanning and detection of additional input and the process

Info

Publication number
TW243505B
TW243505B TW82110494A TW82110494A TW243505B TW 243505 B TW243505 B TW 243505B TW 82110494 A TW82110494 A TW 82110494A TW 82110494 A TW82110494 A TW 82110494A TW 243505 B TW243505 B TW 243505B
Authority
TW
Taiwan
Prior art keywords
ports
detection
keyboard
column
resistance
Prior art date
Application number
TW82110494A
Other languages
Chinese (zh)
Inventor
Chyi-Chang Wu
Original Assignee
United Microelectronics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by United Microelectronics Corp filed Critical United Microelectronics Corp
Priority to TW82110494A priority Critical patent/TW243505B/en
Application granted granted Critical
Publication of TW243505B publication Critical patent/TW243505B/en

Links

Abstract

A process for keyboard scanning and detection of additional input, which uses existing I/O ports to detect whether there is resistance at the row I/O ports and column I/O ports in order to enhance the input performance; the process comprises the following steps: (i) when the keyboard is punched, pausing operation of the keyboard scanning circuit for a period of time; (ii) during the pausing time, detecting whether the row I/O ports and the column I/O ports are connected through resistance, and inputting the detection result into a memory device in order to determine whether row I/O ports and column I/O ports are connected through resistance; (iii) stopping the detection on whether row I/O ports and column I/O ports are connected through resistance, and continuing the keyboard circuit for keyboard scanning.
TW82110494A 1993-12-10 1993-12-10 Device for keyboard scanning and detection of additional input and the process TW243505B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW82110494A TW243505B (en) 1993-12-10 1993-12-10 Device for keyboard scanning and detection of additional input and the process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW82110494A TW243505B (en) 1993-12-10 1993-12-10 Device for keyboard scanning and detection of additional input and the process

Publications (1)

Publication Number Publication Date
TW243505B true TW243505B (en) 1995-03-21

Family

ID=51401011

Family Applications (1)

Application Number Title Priority Date Filing Date
TW82110494A TW243505B (en) 1993-12-10 1993-12-10 Device for keyboard scanning and detection of additional input and the process

Country Status (1)

Country Link
TW (1) TW243505B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI506962B (en) * 2009-08-28 2015-11-01 Hon Hai Prec Ind Co Ltd Keyboard, keyboard scanning circuit and method
TWI777118B (en) * 2020-01-06 2022-09-11 聯陽半導體股份有限公司 Restart control device and restart control method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI506962B (en) * 2009-08-28 2015-11-01 Hon Hai Prec Ind Co Ltd Keyboard, keyboard scanning circuit and method
TWI777118B (en) * 2020-01-06 2022-09-11 聯陽半導體股份有限公司 Restart control device and restart control method
US11467847B2 (en) 2020-01-06 2022-10-11 Ite Tech. Inc. Restart control device and restart control method

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