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MSC1209 Datasheet(PDF) 5 Page - OKI electronic componets |
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¡ Semiconductor MSC1209 5/15 PIN DESCRIPTION Pin Symbol 48 DATA CLOCK 51 LOAD 1 to 20, 22 to 40, 54 to 56 SEG1 to SEG42 42 GRID1 43 GRID2 44 BLANK 45 OSC 46 MODEA 53 SEL 41 VDD 47 VSS Description Serial data input. (Positive logic) Receives display data and dimming data. Shift clock input. Serial data is shifted on the rising edge of this shift clock pulse. Load pulse input. The load signal is input when the transfer of serial data is completed. Segment driver output. Grid driver output. When this pin is set to "L", the display goes on. Connect an external PNP transistor to this pin. The segment data of the first bit (S1) to the 42nd bit (S42) is valid in the 84-bit segment data. Grid driver output. When this pin is set to "L", the display goes on. Connect an external PNP transistor to this pin. The segment data of the 43rd bit (S43) to the 84th bit (S84) is valid in the 84-bit segment data. Input with pull-up resistor for display blank. When this pin is set to "L", the display goes off. (SEGn="L") MODEA MODEB Operating Mode 0 0 Master Operation 10 Test Mode 01 Slave Operation 1 1 Slave Operation Input and output for oscillation. Connect an external capacitor of 68pF. The typical value of oscillating frequency is 512kHz. These pins specify the operating mode. SEL pin of the master IC outputs switching signals for the segment data that corresponds to the grid signals. The SEL pin of the master IC is connected to the MODEA pin of the slave IC. Power supply pin (8V to 18V). GND pin. (Ground) Connected to Microcontroller Microcontroller Microcontroller Anode electrode of VFD tube Grid electrode of VFD tube Grid electrode of VFD tube — — — MODEA pin at slave side Power source Power source Type I I I O O O I I/O I O — — 50 45 68pF 52 MODEB |
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