參數(shù)資料
型號: SAB-XC167CI-16F20F
廠商: INFINEON TECHNOLOGIES AG
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP144
封裝: 0.50 MM PITCH, PLASTIC, TQFP-144
文件頁數(shù): 63/80頁
文件大?。?/td> 2477K
代理商: SAB-XC167CI-16F20F
XC167
Derivatives
Timing Parameters
Data Sheet
62
V1.1, 2003-06
Preliminary
For a period of
N
× TCM the accumulated PLL jitter is defined by the deviation D
N:
DN [ns] = ±(1.5 + 6.32 × N / fMC); fMC in [MHz], N = number of consecutive TCMs.
So, for a period of 3 TCMs @ 20 MHz and K = 12: D3 = ±(1.5 + 6.32 × 3 / 20) = 2.448 ns.
This formula is applicable for K
× N < 95. For longer periods the K× N=95 value can be
used. This steady value can be approximated by: DNmax [ns] = ±(1.5 + 600 / (K × fMC)).
Figure 16
Approximated Accumulated PLL Jitter
Note: The bold lines indicate the minimum accumulated jitter which can be achieved by
selecting the maximum possible output prescaler factor K.
Different frequency bands can be selected for the VCO, so the operation of the PLL can
be adjusted to a wide range of input and output frequencies:
Table 15
VCO Bands for PLL Operation1)
1)
Values guaranteed by design characterisation.
PLLCON.PLLVB VCO Frequency Range
Base Frequency Range
00
100
…150 MHz
20
…80 MHz
01
150
…200 MHz
40
…130 MHz
10
200
…250 MHz
60
…180 MHz
11
Reserved
m c b04413_x c .vs d
A c c. jitte r D
N
±8
±6
ns
±4
±2
±1
0
51 0
2 0
25
N
10
M
H
z
K=5
20
MH
z
40 M
Hz
±7
±5
±3
15
K=6
K= 1 2
K= 1 5
K= 8
K= 1 0
1
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