參數(shù)資料
型號： SAK-XC2220L-12F80V
廠商： INFINEON TECHNOLOGIES AG
元件分類： 微控制器/微處理器
英文描述： 32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PQCC48
封裝： 0.50 MM PITCH, GREEN, PLASTIC, VQFN-48
文件頁數(shù)： 99/112頁
文件大?。?/td> 3122K
代理商： SAK-XC2220L-12F80V
XC2220L, XC2224L
XC2000 Family / Econo Line
Electrical Parameters
PRELIMINARY
Data Sheet
83
V1.0, 2010-12
The timing in the AC Characteristics refers to TCSs. Timing must be calculated using the
minimum TCS possible under the given circumstances.
The actual minimum value for TCS depends on the jitter of the PLL. Because the PLL is
constantly adjusting its output frequency to correspond to the input frequency (from
crystal or oscillator), the accumulated jitter is limited. This means that the relative
deviation for periods of more than one TCS is lower than for a single TCS (see formulas
and Figure 17).
This is especially important for bus cycles using waitstates and for the operation of
timers, serial interfaces, etc. For all slower operations and longer periods (e.g. pulse train
generation or measurement, lower baudrates, etc.) the deviation caused by the PLL jitter
is negligible.
The value of the accumulated PLL jitter depends on the number of consecutive VCO
output cycles within the respective timeframe. The VCO output clock is divided by the
output prescaler K2 to generate the system clock signal
f
SYS. The number of VCO cycles
is K2
× T, where T is the number of consecutive f
SYS cycles (TCS).
The maximum accumulated jitter (long-term jitter) DTmax is defined by:
DTmax [ns] = ±(220 / (K2 × fSYS) + 4.3)
This maximum value is applicable, if either the number of clock cycles T > (
f
SYS / 1.2) or
the prescaler value K2 > 17.
In all other cases for a timeframe of T
× TCS the accumulated jitter D
T is determined by:
DT [ns] = DTmax × [(1 - 0.058 × K2) × (T - 1) / (0.83 × fSYS - 1) + 0.058 × K2]
f
SYS in [MHz] in all formulas.
Example, for a period of 3 TCSs @ 33 MHz and K2 = 4:
Dmax = ±(220 / (4 × 33) + 4.3) = 5.97 ns (Not applicable directly in this case!)
D3 = 5.97 × [(1 - 0.058 × 4) × (3 - 1) / (0.83 × 33 - 1) + 0.058 × 4]
= 5.97
× [0.768 × 2 / 26.39 + 0.232]
= 1.7 ns
Example, for a period of 3 TCSs @ 33 MHz and K2 = 2:
Dmax = ±(220 / (2 × 33) + 4.3) = 7.63 ns (Not applicable directly in this case!)
D3 = 7.63 × [(1 - 0.058 × 2) × (3 - 1) / (0.83 × 33 - 1) + 0.058 × 2]
= 7.63
× [0.884 × 2 / 26.39 + 0.116]
= 1.4 ns
相關(guān)PDF資料
PDF描述
SAK-XC2224L-12F66V 32-BIT, FLASH, 66 MHz, RISC MICROCONTROLLER, PQCC48
SAF-XC2230L-12F80L 32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PQFP64
SAF-XC2234L-20F66L 32-BIT, FLASH, 66 MHz, RISC MICROCONTROLLER, PQFP64
SAK-XC2230L-12F80L 32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PQFP64
SAF-XC2230L-20F66L 32-BIT, FLASH, 66 MHz, RISC MICROCONTROLLER, PQFP64
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SAK-XC2224L-20F66V AA 功能描述:16位微控制器 - MCU 16/32b Sngl Chip MCU 32Bit Performance RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT
SAK-XC2232N-40F80LAA 制造商:Infineon Technologies AG 功能描述:
SAK-XC2234L-20F66L AA 功能描述:16位微控制器 - MCU 16/32b Sngl Chip MCU 32Bit Perform 66MHz RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT
SAK-XC2236N-16F66LAA 制造商:Infineon Technologies AG 功能描述:
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