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AS2574BP датащи(PDF) 6 Page - ams AG |
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AS2574BP датащи(HTML) 6 Page - ams AG |
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6 / 24 page ![]() Data Sheet AS2574B Rev. 1 6 Jan. 1995 No Symbol/command MSB B3 B2 B1 LSB HEX 10 1 1 1 0 0 1C 2 1 0 0 00 000 3 2 0 0 10 004 4 3 0 0 01 002 5 4 1 0 00 010 6 5 1 0 10 014 7 6 1 0 01 012 8 7 0 1 00 008 98 0 1 1 0 0 0C 10 9 0 1 0 1 0 0A 11 a 0 0 1 1 0 06 12 b 1 0 1 1 0 16 13 c 0 1 1 1 0 0E 14 d 1 1 1 1 0 1E 15 * 1 1 0 0 0 18 16 # 1 1 0 1 0 1A 17 Pause 1 1 0 1 1 1B 18 Temporary MF select 1 1 0 0 1 19 19 Recall 0 0 0 0 1 01 20 LS on 0 0 1 0 1 05 21 LS off 0 0 0 1 1 03 22 MT on 1 0 0 0 1 11 23 MT off 0 1 0 0 1 09 24 2nd on 0 0 1 1 1 07 25 2nd off 1 1 1 1 1 1F 26 Set Clock 0 1 0 1 1 0B 27 Start 0 1 1 0 1 0D 28 Start copy 0 1 1 1 1 0F 29 Start FIFO 1 0 0 1 1 13 30 Start timer 1 0 1 0 1 15 31 Blank all 1 1 1 0 1 1D 32 Test mode 1 0 1 1 1 17 Serial Interface The AS2574B supports a serial bus. The protocol defines device that sends data onto the bus as a transmitter, and the receiving device as the receiver. The AS2574B is controlling the transfer and hence the master. The display driver, AS2590, being controlled is the slave. Clock and Data Conventions Data states on the SDA line can change only during SCL low. SDA state changes during SCL high are reserved for indicating start and stop conditions (see figure 1). StartCondition All commands are preceded by the start condition, which is a high to low transition of SDA when SCL is high. StopCondition All communications are terminated by a stop condition, which is low to high transition of SDA when SCL is high. START BIT SDA SCL BIT 0 BIT 1 … … BIT 4 STOP BIT WORD GAP Figure 1: Data Transmission |
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