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參數(shù)資料
| 型號(hào)： | TC9324F |
| 廠商： | Toshiba Corporation |
| 英文描述： | Single-Chip DTS Microcontroller (DTS-20) |
| 中文描述： | 單芯片微丘（丘- 20） |
| 文件頁(yè)數(shù)： | 45/101頁(yè) |
| 文件大小： | 1831K |
| 代理商： | TC9324F |
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TC9324F
2002-02-08
45
4. Programmable Counter Circuit Structure
Pulse Swallow Circuit Structure
This circuit is made up of an amp, 1/2 prescaler, 1/1516 2-modulus prescaler, a 4-bit swallow counter,
and a 13-bit binary programmable counter. When using FMin input, a 1/2 divider is inserted before the
prescaler.
Direct division circuit structure
This circuit bypasses the prescaler and uses the 13-bit programmable counter.
Note: The FMin and AMin pins incorporate amps. Connecting a capacitor permits low-amplitude operation.
The input pins not selected by the division method are high impedance. In PLL Off mode the inputs are
also high impedance. Therefore, the FMin and AMin pins can be used as a wired OR, as shown below.
Note: In PLL Off mode, the entire programmable counter block is halted. At this time, the contents of all the
control ports are saved.
73
FMin
0.01
μ
F
Amp
1/16
1/15
1/15
16
1/2
4-bit
swallow counter
13-bit
programmable counter
P4~P16
P0~P3
Preset
PW
To phase
comparator
74
AMin
0.01
μ
F
HF
FM
74
AMin
Amp
P4~P16
Preset
To phase comparator
13-bit
programmable counter
73
FMin
0.001
μ
F
74
AMin
0.001
μ
F
FM/TV VCO
AM VCO
Example of circuit using VCO
in both FM and AM bands.
73
FMin
0.001
μ
F
74
AMin
AM/FM/TV
VCO
Example of circuit using VCO
shared between FM and AM
bands.
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