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參數(shù)資料
| 型號(hào)： | MSC1208 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | 23-bit x 2 Duplex Controller/Driver with Digital Dimming and Keyscan Function |
| 中文描述： | 23位× 2雙控制器/驅(qū)動(dòng)器，數(shù)字亮度和鍵盤掃描功能 |
| 文件頁數(shù)： | 4/14頁 |
| 文件大?。?/td> | 111K |
| 代理商： | MSC1208 |
4/14
MSC1208
Semiconductor
PIN DESCRIPTIONS
Pin
42
20
19
Symbol
V
DD
GND
DATA
Type
—
—
I/O
Power Sypply Voltage. A 12V power supply is connected.
Ground. 0V is applied.
Serial data input-output.
Enters the input mode when a "H" level signal is input to DATA ENABLE; enters the
output mode when a "L" level signal is input to DATA ENABLE.
Serial clock input.
During the "H" level of clock pulse, the input data of the DATA I/O pin (display data or
dimming data) is read, and during the "L" level of clock pulse, the output data (key
swich data) is output to the DATA I/O pin.
Input for the key matrix.
These pins are "L" active. When these keys are in the inactive state, these pins are at
"H" level through the internal pull-up resistors. COL1 to COL3 are for the rotary switch
and COL4 to COL7 are for the push-button switch.
Signal outputs for scanning key matrix.
Normally, ROW1 to ROW4 output a "I" level. Key scanning is executed only once when
a transfer of the rotary switch contact or pressing down or release of the push-button
switch is detected. Key scanning is continued if the rotary switch contact is in the open
state after this one-time scanning. Then, scanning stops when the rotary switch contact
makes connection with any of the selective contacts. After key scanning is stopped,
ROW1 to ROW4 return to a "L" level.
RC oscillator connection. A capacitor is connected between GND and this pin.
Segment signal output.
Description
DATA
ENABLE
18
I
11 to 17
COL1 to 7
I
7 to 10
ROW1 to 4
O
21
OSC
I/O
O
25 to 41,
1 to 6
23 , 24
SEG1 to 23
Inverted GRID signal output. This signal is connected to an external grid driver
(e.g., PNP transistor) input.
Input for test. Since this pin has as internal a pull-up resistor, leave this pin open or
pull it up for use. When a "L" level signal is input, all segment outputs go on and off
at intervals of 1 second.
GRID1,2
O
22
TEST
I
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