HT16512 Holtek Semiconductor Inc, HT16512 Datasheet
HT16512
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HT16512 Summary of contents
Page 1
... PMOS open-drain and pull-low resistor output) Serial interface with MCU · (CLK, CS, DI, DO) Other similar application panel function · control Serial data inputs to the HT16512 through a three-line serial interface. This VFD control- ler/driver is ideal as a peripheral device for an MCU. 1 HT16512 December 24, 1999 ...
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... Block Diagram Pin Assignment ´ ´ 2 HT16512 December 24, 1999 ...
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... Reads serial data at the rising edge, and outputs data at the I falling edge. Initializes serial interface at the rising or falling edge of the HT16512. Then it waits to receive a command. Data input after CS has fallen is processed as a command. While com- I mand data is processed, current processing is stopped, and the serial interface is initialized ...
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... VFD display off V =V -30V ¾ VFD driver off V = LED0~LED3 V =0. LED0~LED3 S0/K0~S5/K5, -3 S6~S10 4 HT16512 Ta=25°C Typ. Max. Unit 5 5.5 V ¾ 500 650 kHz 100 150 kW ¾ ¾ -10 mA ¾ ¾ mA ¾ ¾ mA ¾ ...
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... CLK rising edge rising edge CLK rising edge CLK falling edge 5 HT16512 Typ. Max. Unit ¾ ¾ ¾ ¾ ¾ 0.3V ¾ ¾ ¾ ...
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... Display RAM and display mode The static display RAM is organized into 22´8 bits and stores the data transmitted from an ex- ternal device to the HT16512 through a serial interface. The contents of the RAM are directly mapped to the contents of the VFD driver. Data in the RAM can be accessed through the data setting, address setting and display control commands ...
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... Commands Commands set the display mode and status of the VFD driver. The first 1 byte input to the HT16512 through the DI pin after the CS pin has fallen, is regarded as a command set high while commands/data are transmitted, serial communication is initial- ized, and the commands/data being transmitted are not valid (however, the commands/data previ- ously transmitted remains valid). · ...
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... Data setting commands These commands set the data write and data read modes. · Address setting commands These commands set the address of the display memory. If address 16H or higher is set, data is ignored until a valid address is set. · Display control commands 8 December 24, 1999 HT16512 ...
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... Timing Diagrams Key scanning and display timing @ m ´ 9 December 24, 1999 HT16512 ...
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... Serial communication format · Reception (command/data write) · Transmission (data read) · Updating display memory by incrementing address HT16512 December 24, 1999 ...
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... Updating specific addresses Application Circuits Note: R =51kW for oscillator resistor OSC R1=1~10kW for external pull-high resistor R2~R5=750W~1.2kW R6~R9=10kW for external pull-low resistor D1~D6=1N4001 Ef=Filament voltage for VFD 11 December 24, 1999 HT16512 ...
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... Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw. 12 December 24, 1999 HT16512 ...