Control Memory

Sequencing Microinstructions

Microprogram Example

Design of Control Unit

Microinstruction Format

Nanostorage and Nanoprogram

- Program stored in memory that generates all the control signals required
to execute the instruction set correctly
- Consists of microinstructions

- Contains a control word and a sequencing word
Control Word - All the control information required for one clock cycle
Sequencing Word - Information needed to decide
the next microinstruction address
- Vocabulary to write a microprogram

Control Memory(Control Storage: CS)
- Storage in the microprogrammed control unit to store the microprogram

Writeable Control Memory(Writeable Control Storage:WCS)
- CS whose contents can be modified
-> Allows the microprogram can be changed
-> Instruction set can be changed or modified

Find Complete Attachement Downloding...............................