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參數(shù)資料
| 型號： | ST6391B1 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | MOSFET; Transistor Polarity:Dual N Channel; Continuous Drain Current, Id:2.6A; On-Resistance, Rds(on):0.18ohm; Package/Case:8-SOIC; Leaded Process Compatible:No; Mounting Type:surface mount; Peak Reflow Compatible (260 C):No |
| 中文描述： | 8位微控制器HCMOS電視頻率合成帶OSD |
| 文件頁數(shù)： | 28/68頁 |
| 文件大?。?/td> | 560K |
| 代理商： | ST6391B1 |
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ON-CHIPCLOCK OSCILLATOR
The internal oscillatorcircuit is designed to require
a minimum of external components. A crystal
quartz, a ceramic resonator, or an external signal
(provided to the OSCin pin) may be used to gener-
ate a system clockwith variousstability/cost trade-
offs. The typical clock frequency is 8MHz. Please
notethatdifferentfrequencieswill affecttheoperation
of thoseperipherals(D/As, SPI)whosereferencefre-
quenciesarederivedfromthesystemclock.
The different clock generator options connection
methodsare shownin Figures 25 and 26. Onema-
chine cycle takes 13 oscillator pulses; 12 clock
pulses are needed to increment the PC while and
additional13thpulseis neededto stabilizethe inter-
nal latchesduring memoryaddressing.This means
thatwith aclockfrequencyof 8MHz the machinecy-
cle is 1.625
μ
s.
The crystal oscillator start-up time is a function of
manyvariables:crystal parameters(especially RS),
oscillatorloadcapacitance(CL),ICparameters,am-
bienttemperature,andsupplyvoltage.Itmustbeob-
served that the crystal or ceramic leads and circuit
connections must be as short as possible. Typical
valuesfor CL1 and CL2are in the range of 15pFto
22pFbuttheseshouldbechosenbasedonthecrys-
talmanufacturersspecification.Typicalinputcapaci-
tanceforOSCin and OSCoutpinsis 5pF.
The oscillatoroutputfrequencyis internallydivided
by 13 to produce the machine cycle and by 12 to
produce theTimerand the Watchdogclock.A byte
cycle is the smallest unit needed to execute any
operation (i.e.,incrementtheprogramcounter).An
instruction may need two, four, or five byte cycles
to beexecuted (See Table 7).
Instruction Type
Cycles
Execution
Time
Branch if set/reset
5 Cycles
8.125
μ
s
Branch & SubroutineBranch
4 Cycles
6.50
μ
s
Bit Manipulation
4 Cycles
6.50
μ
s
Load Instruction
4 Cycles
6.50
μ
s
Arithmetic & Logic
4 Cycles
6.50
μ
s
Conditional Branch
2 Cycles
3.25
μ
s
Program Control
2 Cycles
3.25
μ
s
Table 7. Intructions Timing with 8MHz Clock
Figure 25. Clock Generator Option (1)
Figure 26. Clock Generator Option (2)
Figure 27. OSCin,OSCout Diagram
ST6391,92,93,95,97,99
24/64
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ST6392 | 8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6393 | 8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6395 | 8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6397 | 8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6399 | MOSFET; Transistor Polarity:P Channel; Drain Source Voltage, Vds:-30V; Continuous Drain Current, Id:-4.1A; On-Resistance, Rds(on):0.08ohm; Rds(on) Test Voltage, Vgs:-10V; Package/Case:8-1206; Leaded Process Compatible:No |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST6392 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6392B1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6393 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6393B1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6395 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
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