MAX96715 has VS input pin DIN13/VS, but without HS input dedicated pin. The defaule value of Crossbar_HS(0x3F) is 0x0C. It means it use DIN12 as HS input. But, DIN12 is not connected to its pins.
We can use other pins DIN0-11 as HS input, and use Crossbar_HS to map it as HS. For example, We can connect HS to DIN11/GPIO2, and set register 0x3F to 0x0B. Then DIN11 will be mapped to HS inside.