This simple datapath is of a single-cycle nature. The instruction begins with the PC.
SLT Instruction

The SLT instruction sets the destination register's content to the value 1 if the first source register's contents are
less than the second source register's contents. Otherwise, it is set to the value 0.

It's syntax is:
SLT $destination register's address, $first source register's address, $second source register's address.

The sample SLT instruction demonstrated in the datapath above is SLT $17, $19, $22.

The instruction's equivalent in binary is:

Information on the content of the registers used:
Register's Address Register's Address (Binary) Register's Value Register's Value (Binary)
$17 10001 To be updated To be updated
$19 10011
$22 10110