A Microassembler is required to translate microprograms into executable programs that can be stored in the control memory in microprogramming. Microprogramming is a technique used in computer architecture to implement complex instructions in a processor.

Here is a detailed explanation of why a microassembler is needed for this task:

1. Microprogramming:
- Microprogramming is a method of implementing computer instructions through a sequence of microinstructions.
- Microinstructions are simple, low-level instructions that control the operation of the processor.
- These microinstructions are stored in a control memory, which is a special type of memory used in microprogramming.

2. Control Memory:
- The control memory stores the microinstructions that control the operation of the processor.
- Each microinstruction corresponds to a specific instruction or operation that the processor can perform.
- The control memory is typically implemented using a read-only memory (ROM) or programmable logic devices (PLDs).

3. Microprogram:
- A microprogram is a set of microinstructions that define the behavior of the processor for each instruction or operation.
- It is written in a specialized language called microcode.
- The microprogram specifies the sequence of microinstructions to be executed for each instruction or operation.

4. Translating Microprogram:
- Before the microprogram can be executed by the processor, it needs to be translated into executable programs.
- This translation process is done by a microassembler.
- A microassembler takes the microprogram written in microcode as input and generates the corresponding executable programs.
- These executable programs are then stored in the control memory.

5. Role of Microassembler:
- The microassembler is responsible for translating the microprogram into a format that can be understood and executed by the processor.
- It converts the microinstructions into machine-level instructions that can be directly executed by the hardware.
- The microassembler performs various tasks such as opcode generation, addressing mode handling, and control signal generation.
- It ensures that the microinstructions are correctly encoded and organized to implement the desired behavior of the processor.

In conclusion, a microassembler is required to translate a microprogram into executable programs that can be stored in the control memory in microprogramming. It plays a crucial role in converting the microinstructions into machine-level instructions that can be executed by the processor.