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| 型号： | TC74A23F |
| 厂商： | Toshiba Corporation |
| 英文描述： | RELAY SWITCH; N RELAY SWITCH; FREQUENCY RANGE: DC-4 GHz; SWICH TYPE: SPDT; FEATURE: FAILSAFE; ACTUATING VOLTAGE: 12; VSWR: 1.20:1 @ 4 GHz |
| 中文描述： | 东芝的CMOS数字集成电路硅单片 |
| 文件页数： | 16/20页 |
| 文件大小： | 221K |
| 代理商： | TC74A23F |
TC94A23F
2002-02-06
5
Pin Function
Pin
Number
Symbol
Pin Name
Function and Operation
Remarks
97
COM1/OT1
98
COM2/OT2
99
COM3/OT3
100
COM4/OT4
LCD common output
/output port
Common signal output pins for the LCD panel.
Those pins configure matrix with S1 to S18
and display up to 72 segments.
The LCD can be driven by the 1/2 or 1/3 bias
method. When the 1/2 bias method is set,
three levels, MVDD, 1/2MVDD, and GND, are
output at 2-ms intervals at a 62.5 Hz cycle.
When the 1/3 bias method is set, four levels,
MVDD, 1/3MVDD, 2/3MVDD, and GND, are
output at 1-ms intervals at a 125 Hz cycle
(when either the 4.5 MHz or 75 kHz crystal
oscillator is used).
After system reset or clock stop execution is
released, the non-selected waveform (bias
voltage) is output. The DISP OFF bit is set to
0 and the common signal is output.
These pins can be switched to an output port
(Note 1) or LED driver pins by program. They
are usually used for digit output to drive the
LEDs.
MVDD
Bias
voltage
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