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參數(shù)資料
| 型號： | HS1-82C85RH |
| 廠商： | Intersil Corporation |
| 英文描述： | Radiation Hardened CMOS Static Clock Controller/Generator |
| 中文描述： | 輻射加固的CMOS靜態(tài)時鐘控制器/發(fā)生器 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 189K |
| 代理商： | HS1-82C85RH |
14
Internal logic requires that the SLO/FST pin be held low for
at least 195 oscillator or EFI clock pulses before the SLOW
mode command is recognized. This requirement eliminates
unwanted FAST-to-SLOW mode frequency changes which
could be caused by glitches or noise spikes.
To guarantee FAST mode recognition, the SLO/FST pin
must be held high for at least 3 OSC or EFI pulses. The
HS-82C85RH will begin FAST mode operation on the next
PCLK edge after FAST command recognition. Proper CLK
and CLK50 phase relationships are maintained and
minimum pulse width specifications are met.
FAST-to-SLOW or SLOW-to-FAST mode changes will occur
on the next rising or falling edge of PCLK. It is important to
remember that the transition time for operating frequency
changes, which are dependent upon PCLK, will vary with the
HS-82C85RH oscillator or EFI frequency.
Slow/Fast Mode Control
The HS-82C55ARH programmable peripheral interface can
be used to provide slow/fast mode control by connecting one
of the port pins directly to the SLO/FST pin (see Figure 21).
With the port pin configured as an output, software control of
the SLO/FST pin is provided by simply writing a logical one
(FAST mode) or logical zero (SLOW Mode) to the
corresponding port. PORT C is well-suited for this function
due to its bit set and reset capabilities.
Alternate Operating Modes
Using alternate modes of operation (slow, stop-clock, stop-
oscillator) will reduce the average system operating power
dissipation in a static CMOS system (see Table 2). This does
not mean that system speed or throughput must be reduced.
When used appropriately, the slow, stop-clock, stop-
oscillator modes can make your design more power-efficient
while maintaining maximum system performance.
Oscillator
The oscillator circuit of the HS-82C85RH is designed
primarily for use with an external parallel resonant,
fundamental mode crystal from which the basic operating
frequency is derived. The crystal frequency must be three
times the required CPU clock. X1 and X2 are the two crystal
input connections. The output of the oscillator is buffered
and available at the OSC output (pin 18) for generation of
other system timing signals.
For the most stable operation of the oscillator (OSC) output
circuit, two capacitors (C1 = C2) are recommended.
Capacitors C1 and C2 are chosen such that their combined
capacitance matches the load capacitance as specified by
the crystal manufacturer. This insures operation within the
frequency tolerance specified by the crystal manufacturer.
The crystal/capacitor configuration and the formula used to
determine the capacitor values are shown in Figure 22.
Crystal Specifications are shown in Table 3. For additional
information on crystal operation, see Intersil publication Tech
Brief 47.
HS-82C85RH
CLOCK
CONTROLLER
GENERATOR
CLK
SLO/FST
CLK
D0 - 8
HS-80C86RH
μ
PROCESSOR
HS-82C55RH
PERIPHERAL
INTERFACE
PC0
FIGURE 21. SLOW/FAST MODE CONTROL USING
HS-82C55RH PERIPHERAL INTERFACE
TABLE 2. TYPICAL SYSTEM POWER SUPPLY CURRENT
FOR STATIC CMOS OPERATING MODES
FAST
SLOW
STOP-
CLOCK
STOP-
OSC
CPU Frequency
5MHz
20kHz
DC
DC
XTAL Frequency
15MHz
15MHz
15MHz
DC
IDD
HS-80C86RH
50mA
2.5mA
250
μ
A
250
μ
A
HS-82C85RH
24.7mA
16.9mA
14.1mA
24.4
μ
A
HS-82C08RH
1.0mA
10.0
μ
A
1.0
μ
A
1.0
μ
A
82C82
1.7mA
6.5mA
1.0
μ
A
1.0
μ
A
HS-82C54RH
943
.0μ
A
915.0
μ
A
1.0
μ
A
1.0
μ
A
HS-82C55ARH
3.2
μ
A
1.2
μ
A
1.0
μ
A
1.0
μ
A
74HCXX + Other
2.9mA
110.0
μ
A
90.0
μ
A
90.0
μ
A
HS-65262RH
4.0mA
50.0
μ
A
10.0
μ
A
10.0
μ
A
HS-6617RH
6.3mA
52.5
μ
A
12.0
μ
A
12.0
μ
A
NOTE: All measurements taken at room temperature, VDD = +5.0V.
Power supply current levels will be dependent upon system
configuration and frequency of operation.
X1
X2
C
1
C
2
CRYSTAL
2.4MHz - 15MHz
CT
--------+
(Including stray capacitance)
=
FIGURE 22. CRYSTAL CONNECTION
HS-82C85RH
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HS9-82C85RH | Radiation Hardened CMOS Static Clock Controller/Generator |
| HS1-82C85RH-Q | Radiation Hardened CMOS Static Clock Controller/Generator |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HS1-82C85RH-8 | 制造商:Intersil Corporation 功能描述:CLOCK CNTRLR/GENERATOR 24PIN SBDIP - Rail/Tube |
| HS1-82C85RH-Q | 制造商:Intersil Corporation 功能描述:CLOCK CNTRLR/GENERATOR 24PIN SBDIP - Rail/Tube |
| 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 |
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