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參數(shù)資料
| 型號： | MSC1215-xx |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | 17 x 2 Duplex Driver with Dimming, Keyscan and A/D Converter Function |
| 中文描述： | 17 × 2雙驅(qū)動器，調(diào)光，鍵盤掃描和A / D轉(zhuǎn)換器功能 |
| 文件頁數(shù)： | 16/22頁 |
| 文件大小： | 144K |
| 代理商： | MSC1215-XX |
16/22
MSC1215-xx
Semiconductor
Keyscan
To keep a scanning noise to a minimum, a scanning of the key switch starts only when a key is
pushed down or released. The scanning stops when CS input turns to "L" from "H" after sending
CS pulses two times and display data.
[Key Matrix of COL Input and ROW Output]
ROW1
ROW2
ROW3
COL1
COL2
COL3
COL4
=
S11
S21
S31
S12
S22
S32
S13
S23
S33
S14
S24
S34
A/D Conversion
The IC has a built-in 6-ch
￥
6-bit A/D converter.
As shown in the circuit below, the V
REF
output pin is connected to a variable resistor forming a
voltage divider and the divided analog voltage is used to input into the CH1 to CH6 pins.
[Circuit Example]
V
REF
CH1
Variable
Resistor
PWM Dimming
Lamp PWM signal is input to the VD pin and converted to VF display PWM signal by the PWM
conversion circuit.
The conversion table is mark-programmable.
Note:
The duty cycle of the lamp PWM signal is measured with a reference point of the
threshold voltage of the VD input pin. The threshold voltage changes due to process
parameter deviation. Therefore, the PWM conversion error increases as the rise/fall time
of the lamp PWM increases.
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|---|---|
| MSC1215 | 17×2 Duplex Driver with Dimming, Keyscan and A/D Converter Function(具有模糊、關鍵掃描、模/數(shù)轉(zhuǎn)換功能的17×2顯示雙向驅(qū)動器) |
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相關代理商/技術參數(shù) |
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| MSC1218 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:63-Bit Triplex Controller/Driver with Digital Dimming Function |
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| MSC-125MA | 制造商:OPTIFUSE 功能描述: |
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