Looks like D0 and D1 select the digit (0-3) while LE (Load Enable?) , SDI (Serial Data In), and CLK (Clock) load two 16-bit shift registers for the three sets of 8 segments (7 + decimal point). The remaining 8 bits aren't used.
Looks like D0 and D1 select the digit (0-3) while LE (Load Enable?) , SDI (Serial Data In), and CLK (Clock) load two 16-bit shift registers for the three sets of 8 segments (7 + decimal point). The remaining 8 bits aren't used.