參數(shù)資料
型號： TEA6100
文件頁數(shù)： 25/27頁
文件大小： 513K
代理商： TEA6100
August 1987
25
Philips Semiconductors
Product specification
FM/IF system and microcomputer-based
tuning interface
TEA6100
Example
The example uses the following values:
TIFF = 10,7 MHz; accuracy = LOW (G = 0); F
ref
= 40 kHz (A = 1); IF frequency = 10, 7 MHz (D = 1);
resolution = N1 (F = 1) and counter mode = FM (E = 1)
N1 = (0
×
4
+
1
×
5)
×
(0
×
4
+
1
×
5)
×
8
×
(2
[1
×
2
+
0
×
1]
)
×
(1
×
1
+
0
×
8) = 800
T = 800/40 = 20 ms
N2 = (1
×
16
×
8
+
0
×
[1
×
1
+
0
×
16])
×
(0
×
2
+
1
×
1) = 128
TDEC = 20
×
10,7/128
+
(1
×
247
+
0
×
79) = 1919
THEX; 1919 is hexadecimal 77F and the least significant 2 digits are 7F, so THEX = 7 F
R = 128/20 = 6400 Hz/count
Assume the readout is '6E', the measured frequency will be:
F
I
= 10,7
+
(6E
7F)
×
6400 = 10,59 MHz
Assume the readout is '83', the measured frequency will be:
F
I
= 10,7
+
(83
7F)
×
6400 = 10,726
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