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参数资料
| 型号： | SAF-C164CL-8R25M |
| 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, PQFP80 |
| 封装： | 0.65 MM PITCH, METRIC, PLASTIC, QFP-80 |
| 文件页数： | 52/79页 |
| 文件大小： | 1314K |
| 代理商： | SAF-C164CL-8R25M |
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C164CI/SI
C164CL/SL
Data Sheet
52
V2.0, 2001-05
Due to this adaptation to the input clock the frequency of
fCPU is constantly adjusted so
it is locked to
fOSC. The slight variation causes a jitter of fCPU which also effects the
duration of individual TCLs.
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 12).
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],
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 neglectible.
Note: For all periods longer than 40 TCL the N = 40 value can be used (see Figure 12).
Figure 12
Approximated Maximum Accumulated PLL Jitter
MCD04455
N
Max. jitter
D
N
±1
±10
±20
±30
ns
±26.5
110
20
40
This approximated formula is valid for
1
N
40 and 10 MHz
f
CPU
25 MHz.
10 MHz
16 MHz
20 MHz
25 MHz
30
<
–
<
–
<
–
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相关PDF资料 |
PDF描述 |
|---|---|
| SAF-C164CL-8RM | 16-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP80 |
| SAK-C164CI-8R25M | 16-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP80 |
| SAF-C165-LM3V | 16-BIT, 20 MHz, MICROCONTROLLER, PQFP100 |
| SAF-C165-L25M | 16-BIT, 25 MHz, MICROCONTROLLER, PQFP100 |
| SAF-C165-L25F | 16-BIT, 25 MHz, MICROCONTROLLER, PQFP100 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SAF-C164CL-8RM | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:16-Bit Single-Chip Microcontroller |
| SAFC164CM | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:16-Bit Single-Chip Microcontrol ler |
| SAF-C164CM | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:16-Bit Single-Chip Microcontrol ler |
| SAF-C164CM-4EF | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:16-Bit Single-Chip Microcontrol ler |
| SAF-C164CM-4EF AB | 功能描述:16位微控制器 - MCU 16-Bit Sngl-Chip 5V 20MHz OTP 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 |
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