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参数资料
| 型号： | SAK-C167SR-LM |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP144 |
| 封装： | PLASTIC, MQFP-144 |
| 文件页数： | 68/89页 |
| 文件大小： | 1477K |
| 代理商： | SAK-C167SR-LM |
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C167CR
C167SR
Electrical Parameters
Data Sheet
68
V3.3, 2005-02
The timings listed in the AC Characteristics that refer to TCLs therefore must be
calculated using the minimum TCL that is possible under the respective circumstances.
The actual minimum value for TCL depends on the jitter of the PLL. As the PLL is
constantly adjusting its output frequency so it corresponds to the applied input frequency
(crystal or oscillator) the relative deviation for periods of more than one TCL is lower than
for one single TCL (see formula and Figure 11).
For a period of N
× TCL the minimum value is computed using the corresponding
deviation DN:
(N
× TCL)
min = N × TCLNOM - DN, DN [ns] = ±(13.3 + N × 6.3) / fCPU [MHz],
(1)
where N = number of consecutive TCLs and 1
≤ N ≤ 40.
So for a period of 3 TCLs @ 25 MHz (i.e. N = 3): D3 = (13.3 + 3 × 6.3) / 25 = 1.288 ns,
and (3TCL)min = 3TCLNOM - 1.288 ns = 58.7 ns (@ fCPU = 25 MHz).
This is especially important for bus cycles using waitstates and e.g. 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.
Note: For all periods longer than 40 TCL the N = 40 value can be used (see Figure 11).
Figure 11
Approximated Maximum Accumulated PLL Jitter
±1
±10
1
5
10
20
D
N
±20
±26.5
ns
±30
40 and 10 MHz
This approximated formula is valid for
1 N
33 MHz.
CPU
f
25 MHz
33 MHz
40
MCD04413
N
16 MHz
20 MHz
10 MHz
Max. jitter
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SAK-C167SR-LM HA+ | 功能描述:16位微控制器 - MCU MICROCONTROLLER 16-BIT RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT |
| SAK-C167SR-LM HA+ TR | 制造商:Infineon Technologies AG 功能描述: |
| SAK-C167SR-LMHA+ | 制造商:Infineon Technologies AG 功能描述: 制造商:Rochester Electronics LLC 功能描述: |
| SAKC167SRLMHA+X | 制造商:Infineon Technologies AG 功能描述:MCU 16-Bit C166 CISC/RISC ROMLess 5V 144-Pin MQFP |
| SAKC167SRLMHA+XT | 制造商:Infineon Technologies AG 功能描述:MCU 16-Bit C166 CISC/RISC ROMLess 5V 144-Pin MQFP |
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