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參數(shù)資料
| 型號： | SAFC164CM |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | 16-Bit Single-Chip Microcontrol ler |
| 中文描述： | 16位單芯片Microcontrol萊爾 |
| 文件頁數(shù)： | 56/79頁 |
| 文件大小： | 1314K |
| 代理商： | SAFC164CM |
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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
f
CPU
is constantly adjusted so
it is locked to
f
OSC
. The slight variation causes a jitter of
f
CPU
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 D
N
:
(
N
×
TCL)
min
=
N
×
TCL
NOM
- D
N
; D
N
[ns] =
±
(13.3 +
N
×
6.3)/
f
CPU
[MHz],
where
N
= number of consecutive TCLs and 1
≤
N
≤
40.
So for a period of 3 TCLs @ 25 MHz (i.e.
N
= 3): D
3
= (13.3 +
3
×
6.3)/25 = 1.288 ns,
and (3TCL)
min
= 3TCL
NOM
- 1.288 ns = 58.7 ns (@
f
CPU
= 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
1
10
20
40
This approximated formula is valid for
1
N
<
f
CPU
<
10 MHz
16 MHz
20 MHz
25 MHz
30
<
–
–
<
–
–
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAFC164SI | 16-Bit Single-Chip Microcontroller |
| SAFC164SL | 16-Bit Single-Chip Microcontroller |
| SAK-C164CL-6R25M | 16-Bit Single-Chip Microcontroller |
| SAK-C164CI-8R25M | 16-Bit Single-Chip Microcontroller |
| SAK-C164CI-8RM | 16-Bit Single-Chip Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAF-C164CM | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:16-Bit Single-Chip Microcontrol ler |
| SAF-C164CM-4EF | 制造商:INFINEON 制造商全稱: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 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 安裝風格:SMD/SMT |
| SAFC164CM4EF AB TR | 制造商:Infineon Technologies AG 功能描述: |
| SAFC164CM4EFABX | 制造商:Infineon Technologies AG 功能描述:MCU 16-Bit C166 CISC/RISC 32KB EPROM 5V 64-Pin TQFP |
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