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參數(shù)資料
| 型號： | PCA84C922 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Microcontrollers for universal infrared remote transmitter applications(應(yīng)用于通用紅外線遙控傳送的微控制器) |
| 中文描述： | 對通用紅外遙控發(fā)射器應(yīng)用微控制器（應(yīng)用于通用紅外線遙控傳送的微控制器） |
| 文件頁數(shù)： | 15/36頁 |
| 文件大?。?/td> | 250K |
| 代理商： | PCA84C922 |
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1997 Oct 22
15
Philips Semiconductors
Product specification
Microcontrollers for universal infrared
remote transmitter applications
PCA84C922; PCA84C923
Table 5
Hardware Control Register (address 03H)
Table 6
Description of the HMCTL bits
7
6
5
4
3
2
1
0
WRES
Rint
PWM
LgP
HF
BIT
SYMBOL
WRES
DESCRIPTION
7 to 5
4
These three bits are reserved.
Reset Watchdog Timer. This is not a flip-flop in the register and can only be written to. If a logic 1
is written to this bit the Watchdog Timer is reset.
Reset interrupt. When Rint = 1; the interrupt flag that was set by the derivative logic is cleared.
The Hardware Modulator can only be restarted after the interrupt flag is cleared; this avoids a
second interrupt being generated before the first one has been serviced.
Pulse Width Modulation. When PWM = 1 and LgP = 0; the Pulse Counter Register is ignored
and a continuous pulse train is generated, this is shown in Fig.13.
Long Pulse. When LgP = 1; the contents of the OFF-time Register are ignored. A single pulse is
generated; its pulse width being determined as shown below.
3
Rint
2
PWM
1
LgP
If HF = 1; this pulse is modulated with a frequency
1
4
f
osc
, this is shown in Fig.12.
High Frequency. When HF = 1; the ON-time part of the generated pulse is modulated with a
frequency
1
4
f
osc
, this is shown as CASE 2 in Figs 11 and 12.
0
HF
Pulse width
Contents of ON-time Register
2
+
(
)
number of pulses
(
)
osc
f
×
×
=
handbook, full pagewidth
OFF-time
ON-time
pulse #1
pulse #2
pulse #3
interrupt
end
elapse time by software
OFF-time = 4 (off-time register = 2)
ON-time = 2 (on-time register = 0)
number of pulses = 3
start
MBE345
ILOUT
Fig.10 Example of ILOUT pulse train.
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相關(guān)代理商/技術(shù)參數(shù) |
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| PCA84C922A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Microcontrollers for universal infrared remote transmitter applications |
| PCA84C922AP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Microcontrollers for universal infrared remote transmitter applications |
| PCA84C922AT | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Microcontrollers for universal infrared remote transmitter applications |
| PCA84C922C | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Microcontrollers for universal infrared remote transmitter applications |
| PCA84C922CT | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Microcontrollers for universal infrared remote transmitter applications |
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