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參數(shù)資料
| 型號： | HS1-82C85RH-Q |
| 廠商： | HARRIS SEMICONDUCTOR |
| 元件分類： | XO, clock |
| 英文描述： | Radiation Hardened CMOS Static Clock Controller/Generator |
| 中文描述： | 15 MHz, PROC SPECIFIC CLOCK GENERATOR, CDIP24 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大小： | 189K |
| 代理商： | HS1-82C85RH-Q |
13
The HS-82C85RH status inputs S2/STOP, S1, S0 are
sampled on the rising edge of CLK. The oscillator (F/C LOW
only) and clock outputs are stopped by S2/STOP, S1, S0
being in the LHH state on a low-to-high transition of CLK. This
LHH state must follow a passive HHH state occurring on the
previous low-to-high CLK transition. CLK and CLK50 will stop
in the logic HIGH state after two additional complete cycles of
CLK. PCLK stops in its current state (HIGH or LOW). This is
true for both SLOW and FAST mode operation.
Stop-Oscillator Mode
When the HS-82C85RH is stopped while in the crystal mode
(F/C LOW), the oscillator, in addition to all system clock signals
(CLK, CLK50 and PCLK), are stopped. CLK and CLK50 stop in
the high state. PCLK stops in its current state (high or low).
With the oscillator stopped, HS-82C85RH power drops to its
lowest level. All clocks and oscillators are stopped. All
devices in the system which are driven by the HS-82C85RH
go into the lowest power standby mode. The HS-82C85RH
also goes into standby and requires a power supply current
of less than 100mA.
Stop-Clock Mode
When the HS-82C85RH is in the EFI mode (F/C HIGH) and
a STOP command is issued, all system clock signals (CLK,
CLK50 and PCLK) are stopped. CLK and CLK50 stop in the
high state. PCLK stops in its current state (high or low).
The HS-82C85RH can also provide its own EFI source
simply by connecting the OSC output to the EFI input and
pulling the F/C input HIGH. This puts the HS-82C85RH into
the External Frequency Mode using its own oscillator as an
external source signal (see Figure 19). In this configuration,
when the HS-82C85RH is stopped in the EFI mode, the
oscillator continues to run. Only the clocks to the CPU and
peripherals (CLK, CLK50 and PCLK) are stopped.
Clock Slow/Fast Operation
The SLO/FST input determines whether the CLK and CLK50
outputs run at full speed (crystal or EFI frequency divided by 3)
or at slow speed (crystal or EFI frequency divided by 768) (see
Figure 20). When in the SLOW mode, HS-82C85RH stop-clock
and stop-oscillator functions operate in the same manner as in
the FAST mode, and the frequency of PCLK is unaffected.
The SLOW mode allows the CPU and the system to operate
at a reduced rate which, in turn, reduces system power. For
example, the operating power for the HS-80C86RH CPU is
10mA/MHz of clock frequency. When the SLOW mode is
used in a typical 5MHz system, CLK and CLK50 run at
approximately 20kHz. At this reduced frequency, the
average operating current of the CPU drops to 200mA.
Adding the HS-80C86RH 500mA standby current brings the
total current to 700mA.
While the CPU and peripherals run slower and the
HS-82C85RH CLK and CLK50 outputs switch at a reduced
frequency, the main HS-82C85RH oscillator is still running at
the maximum frequency (determined by the crystal or EFI
input frequency.) Since CMOS power is directly related to
operating frequency, HS-82C85RH power supply current will
typically be reduced by 25% - 35%.
X1
EFI
F/C
S2/STOP
S1
S0
X2
OSC
START
V
DD
START
CONTROL
STOP
CONTROL
FIGURE 19. STOP-CLOCK MODE IN EFI MODE WITH
OSCILLATOR AS FREQUENCY SOURCE
EFI OR OSC
PCLK
SLO/FST
CLK
CLK50
FIGURE 20. SLOW/FAST TIMING OVERVIEW
HS-82C85RH
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HS9-82C85RH-Q | Radiation Hardened CMOS Static Clock Controller/Generator |
| HS12040 | High-speed LAN transmission modular plug, Enhanced category 5 standards; HRS No: 222-2862-9 06; No. of Positions: 8; Connector Type: Cable; Contact Gender: Male; Port Style: 8 Pos.; Termination Style: IDC; Current Rating(Amps)(Max.): 1; Rated Voltage(VAC): 125; Mating/Unmating Cycles: 200; Operating Temperature Range (degrees C): -25 to 60; Generic Name: RJ-45,TIA/EIA-568B,CAT5e; General Description: Modular plug; EMI protection; Plug-latch protection; Enhanced CAT5; Cover:Green |
| HS12045 | High-speed LAN transmission modular plug, Enhanced category 5 standards; HRS No: 222-2862-9 07; No. of Positions: 8; Connector Type: Cable; Contact Gender: Male; Port Style: 8 Pos.; Termination Style: IDC; Current Rating(Amps)(Max.): 1; Rated Voltage(VAC): 125; Mating/Unmating Cycles: 200; Operating Temperature Range (degrees C): -25 to 60; Generic Name: RJ-45,TIA/EIA-568B,CAT5e; General Description: Modular plug; EMI protection; Plug-latch protection; Enhanced CAT5; Cover:Blue |
| HS12135 | 120 Amp Schottky Rectifier |
| HS12140 | 120 Amp Schottky Rectifier |
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| HS183100 | 制造商:Microsemi Corporation 功能描述:POWER MODULE - DIODE - Bulk |
| HS183100R | 制造商:Microsemi Corporation 功能描述:HS183100R - Bulk |
| HS18380 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:180 Amp Schottky Rectifier |
| HS18380_11 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:180 Amp Schottky Rectifier |
| HS18380R | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Schottky Rectifier |
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