| 摘要 |
The digital keyphone line status displaying unit comprises: a microprocessor(1) with data(D0-D7) and address(A0-A15); a decoder(2) decoding the address(A0-A15) from the microprocessor(1); a data latch(3) enabled by the signal from the decoder(2) and latching data(D0-D7) outputed from the microprocessor(1); a LCD display driver(4) driving the LCD panel(5) according to the signals from the microprocessor(1) and the data latch(2); a LCD display panel(5) driven by the LCD display driver(4) and controlled by the signals from the microprocessor(1).
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