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MC144144P bảng dữ liệu(PDF) 5 Page - Motorola, Inc |
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MC144144P bảng dữ liệu(HTML) 5 Page - Motorola, Inc |
5 / 44 page MC144144 5 MOTOROLA AC AND TIMING CHARACTERISTICS (continued) Parameter Conditions Horizontal Timing The timing of the ouput signals box and RGB have been set to make a centered display. The positioning of these outputs can be adjusted in 330 ns increments by writing a new value to the H Position Register. Control Port Signals – Two–Wire Serial Mode (SMS = LOW, SEN = HIGH) (See Figure 10) Clock and Data Transitions: The SCK and SDA bus lines are normally pulled high with a resistor. Data on the SDA bus may only change during SCK low time periods. Data changes during SCK high periods will indicate a start or stop condition. Start Condition: A high–to–low transition of SDA with SCK high is a start condition which must precede any other command. Stop Condition: A low–to–high transition of SDA with SCK high is a stop condition which terminates all communications. Acknowledge: All address and data words are serially transmitted to and from the MC144144 in eight bit words. A ninth bit time is used for the acknowledge. The acknowledging device does so by pulling the SDA bus low during the ninth bit. Control Port Signals – Three–Wire Serial Mode (SMS = HIGH) (See Figure 11) Three–wire bus with Clock signal on SCK pin, Serial Data Input on SDA pin and Serial Data Output on SDO pin. SEN pin LOW disabled the port, placing SDO in three–state. Signal transitions on SCK and SDA are ignored. SEN pin HIGH enables the port for operation. SEN and SMS pins LOW is a hardware reset for the part. These pins must be held low for at least 100 ns. Serial synchronization can be established by clocking in the minimum required SSR string of FFh, FFh, FEh. More than two bytes of FFh may be input but the string must end with FEh. |
Số phần tương tự - MC144144P |
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Mô tả tương tự - MC144144P |
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