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| 型號(hào)： | CYW2320ZIT |
| 文件頁(yè)數(shù)： | 8/9頁(yè) |
| 文件大?。?/td> | 217K |
| 代理商： | CYW2320ZIT |
CYW2315
8
Document #: 38-00918
Table 3. 7-Bit Swallow Counter (A) Truth Table
[8]
Divide Ratio A
A7
A6
A5
A4
A3
A2
A1
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
1
:::
:::
:::
:::
:::
:::
:::
:::
126
1
1
1
1
1
1
0
127
1
1
1
1
1
1
1
Table 4. 11-Bit Programmable Counter (B) Truth Table
[9]
Divide Ratio B
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
3
0
0
0
0
0
0
0
0
0
1
1
4
0
0
0
0
0
0
0
0
1
0
0
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
2046
1
1
1
1
1
1
1
1
1
1
0
2047
1
1
1
1
1
1
1
1
1
1
1
Table 5. 14-Bit Programmable Reference Counter Truth Table
[9]
Divide Ratio R
R14
R13
R12
R11
R10
R9
R8
R7
R6
R5
R4
R3
R2
R1
3
0
0
0
0
0
0
0
0
0
0
0
0
1
1
4
0
0
0
0
0
0
0
0
0
0
0
1
0
0
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
16382
1
1
1
1
1
1
1
1
1
1
1
1
1
0
16383
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Ordering Information
[10]
Ordering Code
CYW2315
Package
Name
X
Package Type
20-pin TSSOP (0.173
”
wide)
TR
Tape and Reel Option
Notes:
8.
9.
fvco = {(P * B) + A} * fosc / R where (A < B)
B is greater than or equal to A.
Divide ratio less than 3 is prohibited. The divide ratio can be calculated using the following equation:
10. Operating temperature range:
–
40
°
C to +85
°
C.
fvco: Output frequency of the external VCO.
fosc: The crystal reference oscillator frequency.
A: Preset divide ratio of the 7-bit swallow counter (0 to 127).
B: Preset ratio of the 11-bit programmable counter (3 to 2047).
P: Preset divide ratio of the dual modulus prescaler (64/65 or 128/129).
R: Preset ratio of the 14-bit programmable reference counter (3 to 16383).
The divide ratio N = (P * B) + A.
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