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參數(shù)資料
| 型號： | PCA2000 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 32 kHz watch circuit with programmable adaptive motor pulse |
| 中文描述： | 32千赫的可編程自適應(yīng)脈沖馬達手表電路 |
| 文件頁數(shù)： | 12/19頁 |
| 文件大?。?/td> | 120K |
| 代理商： | PCA2000 |
2003 Dec 17
12
Philips Semiconductors
Product specification
32 kHz watch circuit with programmable
adaptive motor pulse
PCA2000; PCA2001
Measurement of oscillator frequency and inhibit time
The output of the two measuring states can either be
monitored directly at pad RESET or as a modulation of the
supply voltage (a modulating resistor of 30 k
is
connected between V
DD
and V
SS
when the signal at
pad RESET is at HIGH-level).
You must follow the supply voltage modulation (see
Fig.10)) in order to guarantee the correct start up of the
circuit during production and testing.
Measuring states:
State 1: quartz crystal oscillator frequency divided by
1024; state 1 starts with a pulse to V
P
and ends with a
second pulse to V
P
State 2: inhibit time (see Figs 11 and 12); a signal with
periodicity of 31.25 + n
×
0.122 ms appears at
pad RESET and as current modulation at pad V
DD
.
Customer testing
Connecting pad RESET to V
SS
activates the test mode. In
thistestmode,themotoroutputfrequencyis8 Hz;theduty
cycle reduction and battery check occurs every second,
instead of every 4 minutes. If the supply voltage drops
below the EOL threshold voltage, the motor output
frequency is 32 Hz with the highest driving level.
EOL of battery
The supply voltage is checked every 4 minutes. If it drops
below the EOL reference (1.38 V for silver-oxide, 2.5 V for
lithium batteries), the motor steps change from one pulse
per second to a burst of four pulses every 4 seconds. The
step detection is switched off, and the motor is driven with
the highest pulse level.
Only the PCA2000 has an EOL function.
V
DD
V
P(stop)
t
(start)
>
500 ms
V
SS
V
DD(nom)
001aaa055
t
p(stop)
Fig.10 Supply voltage at start up during production
and testing.
handbook, halfpage
MGW355
VDD
VSS
31.25 ms
+
inhibition time
Fig.11 Output waveform at pad RESET for
instruction state 2.
handbook, halfpage
VP(start)
VP(mod)
VP(stop)
t1
tp(start)
t0
VSS
VDD(nom)
MGU719
tp(stop)
Fig.12 Supply voltage modulation for starting and
stopping of instruction state 2.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PCA200010AA | 32 kHz watch circuit with programmable adaptive motor pulse |
| PCA2000AA | 32 kHz watch circuit with programmable adaptive motor pulse |
| PCA2001 | 32 kHz watch circuit with programmable adaptive motor pulse |
| PCA200110AA | 32 kHz watch circuit with programmable adaptive motor pulse |
| PCA2001AA | 32 kHz watch circuit with programmable adaptive motor pulse |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA2000_10 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:32 kHz watch circuit with programmable adaptive motor pulse |
| PCA200010AA | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:32 kHz watch circuit with programmable adaptive motor pulse |
| PCA2000AA | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:32 kHz watch circuit with programmable adaptive motor pulse |
| PCA2000CX8/5 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:32 kHz watch circuit with programmable adaptive motor pulse |
| PCA2000CX8/5/1,025 | 功能描述:馬達/運動/點火控制器和驅(qū)動器 32KHZ WATCH CIRCUIT RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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