rej05b0272_r8cap| Application Note
APPLICATION NOTE
R8C/11 GROUP
SAMPLE PROGRAM THREE MINUTES TIMER
1. Abstract
Three minutes timer uses below functions. Timer X ( Timer mode ) Timer Z ( Programmable waveform generation mode )
REJ05B0272-0110Z Rev.1.10 Nov 10, 2003
2. Introduction Operation (1) Three minutes timer is divided by three mode.
Standby mode Three minutes timer mode
SW2(KI0)
Reset cancellation
Standby mode
Press key
Three minutes timer mode
SW3(INT0) Press key
(2) After the reset cancellation, the microcomputer changes to standby mode. (3) When pressing SW2(K10) in standby mode, the microcomputer changes to three minutes timer mode. (4) The microcomputer executes three minutes count operation in three minutes timer mode. (5) When the microcomputer completes three minutes count operation, buzzer sounds two times and the microcomputer places in standby mode. ( Buzzer detailed operation is described as following ) (6) When pressing SW3(INT0) in three minutes timer mode, the microcomputer changes to standby mode. (7) The key input samples by 10ms periods and confirms by three times match (chattering removal ) (8) The input keys, SW2(KI0) and SW3(INT0) are "L" active("L": with pushing "H": without pushing ). (9) In three minutes timer mode, the LED indicates as below. LED indication for elapsed time : More than 2 minutes left More than 1 minute left More than 10 seconds left Less than 10 seconds left
0 second left ( during buzzer sounds )
LED1(Red) Turn off Turn off Turn off Turn off Turn on
LED2(Green) 500ms Period blinking 500ms Period blinking 500ms Period blinking 250ms Period blinking Turn off
LED3(Green) 500msPeriod blinking 500msPeriod blinking Turn off Turn off Turn off
LED4(Green) 500ms Period blinking Turn off Turn off Turn off Turn off
REJ05B0272-0110Z/Rev.1.10
November 2003
Page 1 of 22
rej05b0272_r8cap Application Note renesas Download PDF
Add this permalink to your bookmarks for future download of rej05b0272_r8cap ApplicationNote
Permalink: http://application.emcelettronica.com/renesas/rej05b0272_r8cap
