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參數(shù)資料
| 型號： | T4223B-MF |
| 廠商： | ATMEL CORP |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | Time-Code Receiver with A/D Converter |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, UUC22 |
| 封裝： | DIE-22 |
| 文件頁數(shù)： | 13/18頁 |
| 文件大?。?/td> | 138K |
| 代理商： | T4223B-MF |
U4223B
Rev. A7, 06-Mar-01
13 (18)
Information on the German Transmitter
Station: DCF 77,
Frequency 77.5 kHz,
Transmitting power 50 kW
Location: Mainflingen/Germany,
Geographical coordinates: 50
Time of transmission: permanent
0.1’N, 09
00’E
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
minutes
25
26
27
28
30
29
31
32
hours
33
34
35
1
2
4
8
10
20
40
P1
1
2
4
8
10
20
P2
A
Z
Z
1
2
4
S
2
1
8
R
4
P
1
8
1
2
2
4
P
1
4
2
8
2
1
1
2
4
1
2
4
8
1
2
4
8
1
1
2
4
8
P
Time frame 1 minute
( index count 1 second )
Time frame
calendar
day
20
seconds
s
Start Bit
Parity Bit P1
Parity Bit P2
Example:19.35 h
A
Figure 24.
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 infor-
mation 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 addi-
tional bits R (transmission by reserve antenna), A1
(announcement of change-over to summer time), Z1 (dur-
ing 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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