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LC75818PT Folha de dados(PDF) 9 Page - ON Semiconductor |
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LC75818PT Folha de dados(HTML) 9 Page - ON Semiconductor |
9 / 43 page LC75818PT No.A0964-9/43 Continued from preceding page. Pin Pin No. Function Active I/O Handling when unused VLCD3 111 LCD drive 1/4 bias voltage (middle level) supply pin. This pin can be used to supply the 1/4 (VLCD0 - VLCD4) voltage level externally. - I OPEN VLCD4 112 LCD drive 0/4 bias voltage (low level) supply pin. Fine adjustment of the display contrast can be implemented by connecting an external variable resistor to this pin. However, (VLCD0 - VLCD4) must be greater than or equal to 4.5V, and VLCD4 must be in the range 0V to 1.5V, inclusive. - I GND VDD 106 Logic block power supply connection. Provide a voltage of between 2.7to 3.6V. - - - VLCD 107 LCD driver block power supply connection. Provide a voltage of between 7.0 to 10.0V when the display contrast adjustment circuit is used and provide a voltage of between 4.5 to 10.0V when the circuit is not used. - - - VSS 113 Power supply connection. Connect to ground. - - - Block Functions • AC (address counter) AC is a counter that provides the addresses used for DCRAM and ADRAM. The address is automatically modified internally, and the LCD display state is retained. • DCRAM (data control RAM) DCRAM is RAM that is used to store display data expressed as 8-bit character codes. (These character codes are converted to 5 ×7, 5×8, or 5×9 dot matrix character patterns using CGROM or CGRAM.) DCRAM has a capacity of 64 ×8 bits, and can hold 64 characters. The table below lists the correspondence between the 6-bit DCRAM address loaded into AC and the display position on the LCD panel. • When the DCRAM address loaded into AC is 00H. Display digit 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DCRAM address (hexadecimal) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F However, when the display shift is performed by specifying MDATA, the DCRAM address shifts as shown below. Display digit 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DCRAM address (hexadecimal) 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 (shift left) Display digit 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DCRAM address (hexadecimal) 3F 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E (shift right) Note: *3. The DCRAM address is expressed in hexadecimal. DCRAM address DA0 DA1 DA2 DA3 DA4 DA5 Hexadecimal Hexadecimal Example: When the DCRAM address is 2EH. DA0 DA1 DA2 DA3 DA4 DA5 0 1 1 1 0 1 Most significant bit ↓ MSB Least significant bit ↓ LSB |
Nº de peça semelhante - LC75818PT |
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Descrição semelhante - LC75818PT |
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