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LC7573NM Datasheet(PDF) 4 Page - Sanyo Semicon Device |
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LC7573NM Datasheet(HTML) 4 Page - Sanyo Semicon Device |
4 / 10 page Pin Functions Serial Data Transfer Format 1. When CL is stopped at the low level 2. When CL is stopped at the high level Figure 2 No. 3587-4/10 LC7573N, 7573NM Pin No. Pin I/O Function Handling when unused 1 VFL — Driver block power supply. A voltage of between 8.0 and 18.0 V must be supplied. — 2 VDD — Logic block power supply. A voltage of between 4.5 and 5.5 V must be supplied. — 5 VSS — Ground. Must be connected to the system ground. — 3 OSC I/O Oscillator connection. An oscillator circuit is formed by connecting an external resistor and capacitor to this pin. VDD Display off control input 4 BLK I BLK = low (VSS): Display off (G1 and G2 = low) GND BLK = high (VDD): Display on Note that serial data can be transferred while the display is turned off. 7 CL Serial data transfer inputs. These pins must be CL: synchronization clock 8 DI I connected to the system controller. DI: transfer data GND 9 CE CE: chip enable When the analog dimmer is selected, the analog voltage applied to this pin controls the duty of the G1 and G2 digit output pins. Since a 6-bit A/D converter is applied to this analog voltage and that result is 6 DIM I input to a decoder that provides a built-in dimmer curve, the relationship between the analog voltage GND and the duty can be specified as a mask program. Note that 63/96 · VDD is the full-scale level for the 6-bit A/D converter. 30, 29 G1, G2 O Digit outputs. The frame frequency fO is (fOSC/4096) Hz Open 28 to 10 S1 to S19 O Segment outputs for displaying the display data transferred by serial data input. Open |
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