The string is shown by individual characters to the 7-segment LCD. By default with all pins except Clock being Low, the chip will cycle through all the characters depending on clock speed. To display individual characters manually, set HIGH to counter pin and BCD. Then select the bits 0-3 manually.
See how_it_works.
7-segment LCD
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | clock | 7-segment a | |
| 1 | 7-segment b | ||
| 2 | 7-segment c | ||
| 3 | 7-segment d | ||
| 4 | Disable counter. This is active-high. | 7-segment e | |
| 5 | Driven by BCD or counter. High for BCD, Low for counter. | 7-segment f | |
| 6 | BCD bit 3 | 7-segment g | |
| 7 | BCD bit 2 |