參數(shù)資料
型號: SAK-TC1765T-L40EB
廠商: INFINEON TECHNOLOGIES AG
元件分類: 微控制器/微處理器
英文描述: 32-BIT, MROM, 40 MHz, MICROCONTROLLER, PBGA260
封裝: PLASTIC, LBGA-260
文件頁數(shù): 51/88頁
文件大?。?/td> 1274K
代理商: SAK-TC1765T-L40EB
TC1765
Data Sheet
51
V1.2, 2002-12
Preliminary
PLL Operation
The
fVCO clock of the PLL has a frequency which is a multiple of the externally applied
clock
fOSC. The factor for this is controlled through the fix divider value N (N = 10) applied
to the divider in the feedback path. The K-Divider is defined by bit field KDIV. Table 6
lists the possible values for KDIV and the resulting division factor.
The VCO output frequency and the resulting system clock is determined by:
Table 6
Output Frequencies
fSYS Derived from Various Output Factors
K-Factor
fSYS
Duty
Cycle
[%]
Selected
Factor
KDIV
fVCO =
150 MHz
fVCO =
160 MHz
fVCO =
200 MHz
2
000B
751)
1) These combinations cannot be used because the maximum system clock of 40 MHz is exceeded.
1001)
50
4
010B
37.5
40
50
52)
2) These odd K-Factors should not be used (not tested because of the unsymmetrical duty cycle).
011B
30
32
40
6
100B
24.5
26.67
33.33
50
8
101B
18.75
20
25
50
110B
16.67
17.78
22.22
44
10
111B
15
16
20
50
16
001B
9.38
10
12.5
50
fVCO = 10 × fOSC
fSYS = fVCO / K =
× f
OSC
10
K
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