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Reference application circuit diagram

Typical application is shown in Figure 3, Figure 4. Figure 3 uses the GR-terminal utilizing key approach,

Figure 4 uses the SG-terminal utilizing key approach. No matter which way to choose, then when scan the button,

please make sure the digital display is closed, namely: when use the GR-terminal utilizing key approach, make

sure that SG port output is low; otherwise, when use the SG-terminal utilizing key approach, make sure that GR

port output is high, to turn off the LED.

Note：Please note that there are 6-bit space in the shift register when programming.

Figure 3、HM1642 Typical Application1

HM16