Dcf77 Radio Clock; Introduction - Mitsubishi alpha 2 Hardware Manual

α
2 Simple Application Controllers
10.

DCF77 Radio Clock

The DCF77 function for the
from receiving and decoding DCF77 time information that is broadcast over the radio signal
77.5kHz from Frankfurt/Germany.
Deutschland
Radio band C (long wave)
Frankfurt
77.5kHz
10.1

Introduction

Table 10.1: Radio Clock
Transmitter location
Frequency
Transmission Range
Coding
Transmitted Data
Transmission Time
The carrier amplitude is reduced to 25% at the beginning of each second for a period of 100ms
(binary:0) or 200ms (binary:1), except for the 59th second.
α
2 series provides automatic setup of the RTC (Real Time Clock)
Item
DCF77
Mainflingen, 25km south of Frankfurt/Germany
77.5kHz
2000km
BCD (Binary Coded Decimal)
minutes, hours, calendar day, day of the week, month, year
24 hours daily
DCF77 Radio Clock 10
Content
ENG-48