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EAEVALEDIP128B Datasheet(PDF) 7 Page - List of Unclassifed Manufacturers |
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EAEVALEDIP128B Datasheet(HTML) 7 Page - List of Unclassifed Manufacturers |
7 / 29 page EAeDIP128-6 Page 7 ELECTRONIC ASSEMBLY reserves the right to change specifications without prior notice. Printing and typographical errors reserved. I²C - Address Pin 11,7,6 Base address I²C address BA2 BA1 BA0 D7 D6 D5 D4 D3 D2 D1 D0 L L L $10 0 0 0 1 S A 2 S A 1 S A 0 R W L L H $20 0 0 1 0 L H L $30 0 01 1 L H H $40 0 10 0 H L L $70 0 1 1 1 H L H $90 1 0 0 1 H H L $B0 1 0 1 1 H H H $D0 1 1 0 1 Pinout eDIP128-6: I2C mode Pin Symbol In/Out Function Pin Symbol In/Out Function 1 GND Ground Potential for logic (0V) 17 DPROT In L: Disable Smallprotokoll do not connect for normal operation 2 VDD Power supply for logic (+5V) 18 PWR Out L: Normal Operation H: Powerdownmode 3 NC do not connect 19 NC do not connect 4 NC do not connect 20 TEST SBUF In Out open-drain with internal pullup 20k..50k IN (Power-On) L: Testmode OUT L: data in sendbuffer 5 RESET In L: Reset 21 GND Ground (0V) 6 BA0 In Basic Address 0 22 VDD Power supply (+3,3..5V) 7 BA1 In Basic Address 1 23 NC do not connect 8 SA0 In Slave Address 0 24 NC do not connect 9 SA1 In Slave Address 1 25 IN8/OUT1 8 digital inputs (internal 20k..50k pullup) alternativ up to 8 digital outputs maximum current: IOL = IOH = 10mA 10 SA2 In Slave Address 2 26 IN7/OUT2 11 BA2 In Basic Address 2 27 IN6/OUT3 12 I2CMOD In connect to GND for I²C interface 28 IN5/OUT4 13 WUP In L: (Power-On) disable Power-On-Macro L: Wakeup from Powerdownmode 29 IN4/OUT5 14 SDA Bidir. Serial Data Line 30 IN3/OUT6 15 SCL In Serial Clock Line 31 IN2/OUT7 16 BUZZ Out Buzzer output 32 IN1/OUT8 Application note I²C-BUS INTERFACE If the display is wired as shown below, it can be operated directly on an I²C bus. 8 different base addresses and 8 slave addresses can be selected on the display. Data transfer is possible at up to 100 kHz. However, if pauses of at least 100 µs are maintained between the individual bytes during transfer, a byte can be transferred at up to 400 kHz. Note: The pins DORD, CPOL, CPHA, DPOM, DPROT and TEST/SBUF have an internal pullup, which is why only the LO level (0=GND) is to be actively applied. These pins must be left open for a hi level. On pin 20 (SBUF) the display indicates with a low level that data is ready to be retrieved from the internal send buffer. The line can be connected to an interrupt input of the host system, for example.. DATATRANSFER I²C INTERFACE principle I2C-bus transfer: - I²C-Start - Master-Transmit: EA eDIP-I²C-address (e.g. $DE), send smallprotocol package (data) - I²C-Stop - I²C-Start - Master-Read: EA eDIP-I²C-Address (e.g. $DF), read ACK-byte and opt. smallprotocoll package (data) - I²C-Stop Read operation: for internal operation the EA eDIP does need a short time before providing the data; therefore a short pause of min. 6µs is needed for each byte (no activity of SCL line). all pins open: Write $DE Read $DF |
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