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IK2108A Datasheet(PDF) 2 Page - IK Semicon Co., Ltd |
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IK2108A Datasheet(HTML) 2 Page - IK Semicon Co., Ltd |
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2 / 21 page  IK2108A 2 May 2012, Ver. 03 Pin Name I/O Description Pin № SOP-32 LQFP- 32 RCUR I/O A resistor is connected to this pin to determine the output currents and oscillation frequency. 1 30 DI/O I/O Data Input - Output Pin This pin inputs serial data at the rising edge of the shift clock (starting from the bit) Data Output Pin - N-Channel, Open-Drain This pin outputs serial data at the falling edge of the shift clock 2 31 CLK I Clock Input Pin This pin reads serial data at the rising edge and output data at the falling edge. 3 32 STB I Serial Interface Strobe Pin The data input after the STB has fallen is processed as a command. When this pin is HIGH, CLK is ignored. 4 1 K1 to K3 I Key Data Input Pins The data sent to these pins are latched at the end of the display cycle. (Internal Pull-Up Resistor) 5-7 2-4 VDD - Power Supply for Digital Part 8 5 VCC - Power Supply for Output Part 24 21 SG1/KS1 to SG10/KS10 O Segment Output Pins (N-channel open drain) Also acts as the Key Source 10-19 7-16 SG11/GR12 to SG14/GR9 O Segment / Grid Output Pins 20-23 17-20 GR8 to GR1 O Grid Output Pins (P-Channel, Open Drain) 25-32 22-29 GND - Ground Pin 9 6 BLOCK DIAGRAM Serial Data Interface OSC Display Memory Control Timing Generator Key Matrix Memory Current Reference Voltage Reference Dimming Circuit Segment Driver/ Key Scan Output/ Grid Driver GR1 GR2 GR3 GR4 GR5 GR6 GR7 GR8 SG10/KS10 SG9/KS9 SG11/GR12 SG12/GR11 SG13/GR10 SG14/GR9 SG1/KS1 SG2/KS2 SG3/KS3 SG4/KS4 SG5/KS5 SG6/KS6 SG7/KS7 SG8/KS8 GND VCC VDD K1 K2 K3 R GND RCUR DI/O CLK STB |
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