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參數(shù)資料
| 型號： | ACD2200S8 |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 302K |
| 代理商： | ACD2200S8 |
7
11-Bit Programmable Counter Divide Ratio (B Counter)
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Notes:
Divide Ratio: 3 to 2047 (Divide ratios less than 3 prohibited)..
B > A
Pulse Swallow Function
f
VCO
= [(P x B) + A] x f
/R
f
VCO
:
B:
A:
f
OSC
:
R:
P:
Output frequency of external voltage controlled oscillator (VCO).
Preset divide ratio of binary 11-bit programmable counter (3 to 2047).
Preset divide ratio of 7-bit swallow counter (0 < A < P; A < B).
Output frequency of the external reference frequency crystal or oscillator.
Preset divide ratio of binary 15-bit programmable reference counter (3 to 32767).
Preset modulus of dual modulus prescaler (P = 64).
Programmable Modes
Several modes of operation can be programmed with bits R16-R20 including the phase detector polarity and
the output of the LDf
pin. The programmable modes are shown in Table I. Truth tables for the programmable
mdoes and LDf
o
output are shown in Table II and Table III.
TABLE I. Programmable Modes
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