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參數(shù)資料
| 型號： | T4227-FBG3 |
| 廠商： | TEMIC SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO16 |
| 封裝： | SSOP-16 |
| 文件頁數(shù)： | 12/13頁 |
| 文件大?。?/td> | 105K |
| 代理商： | T4227-FBG3 |
T4227
Rev. A2, 24-Jul-00
Preliminary Information
8 (13)
Information on the German Transmitter
(Customer is responsible to verify the information!)
Station: DCF 77,
Frequency 77.5 kHz,
Transmitting power 50 kW
Location: Mainflingen/Germany,
Geographical coordinates: 50
_ 0.1’N, 09_ 00’E
Time of transmission: permanent
0
5
10
15
20
25
30
40
50
55
0
5
10
coding
when
required
minutes
hours
day
of
the
week
month
year
35
45
21
22
23
24
25
26
27
28
30
29
31
32
33
34
35
12
4
8
10
20
40
P1
1
2
4
810
20
P2
A1 Z1 Z2
1 2 4
S
20
10
8
R
40 P1 1
8 10 20
2 4
P2 1
4
2
8
20
10
1 2 4 1 2 4 8 10
2 4 8 10
1
20 40 80 P3
Time frame 1 minute
( index count 1 second )
Time frame
calendar
day
minutes
hours
20
seconds
s
Start Bit
Parity Bit P1
Parity Bit P2
Example:19.35 h
93 7527
A2
Figure 15.
Modulation
The carrier amplitude is reduced to 25% at the beginning
of each second for a period of 100 ms (binary zero) or
200 ms (binary one), except the 59th second.
Time-Code Format (based on
Information of Deutsche Bundespost)
The time-code format consists of 1-minute time frames.
There is no modulation at the beginning of the 59th
second to indicate the switch over to the next 1-minute
time
frame.
A
time
frame
contains
BCD-coded
information of minutes, hours, calendar day, day of the
week, month and year between the 20th second and 58th
second of the time frame, including the start bit S
(200 ms) and parity bits P1, P2 and P3. Furthermore, there
are 5 additional bits R (transmission by reserve antenna),
A1 (announcement of change-over to summer time), Z1
(during summer time 200 ms, otherwise 100 ms), Z2
(during standard time 200 ms, otherwise 100 ms) and A2
(announcement of leap second) transmitted between the
15th second and 19th second of the time frame.
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