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Organisasi dan Arsitektur Komputer

Pertemuan 5 : Control Unit. Organisasi dan Arsitektur Komputer. CONTROL UNIT. Bagian dari komputer yang menggenerasi signal yang mengontrol operasi komputer . Tugas Control Unit adalah mengontrol sisklus MesinVon Neumann. Kebutuhan Fungsional. Mendefinisikan elemen dasar prosesor

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Organisasi dan Arsitektur Komputer

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  1. Pertemuan 5 : Control Unit Organisasi dan Arsitektur Komputer

  2. CONTROL UNIT • Bagiandarikomputer yang menggenerasi signal yang mengontroloperasikomputer. • Tugas Control Unit adalahmengontrolsisklusMesinVon Neumann

  3. KebutuhanFungsional • Mendefinisikanelemendasarprosesor • Mendiskripsikanoperasimikro yang harusdilakukanprosesor • Menentukanfungsi Control Unit yang harusdilakukanprosesor

  4. Micro-Operations • A computer executes a program • Fetch/execute cycle • Each cycle has a number of steps • see pipelining • Called micro-operations • Each step does very little • Atomic operation of CPU

  5. Constituent Elements of Program Execution

  6. Fetch - 4 Registers • Memory Address Register (MAR) • Connected to address bus • Menetapkanalamat word dimemoriuntukdibacaatauditulis • Memory Buffer Register (MBR) • Connected to data bus • Menyimpan data untukditulisatauuntukmenerima word darimemori • Program Counter (PC) • Menyimpanalamatpasanganinstrukdiberikutnya • Instruction Register (IR) • Menyimpaninstruksiopcode yang sedangdieksekusi

  7. Fetch Sequence • Address of next instruction is in PC • Address (MAR) is placed on address bus • Control unit issues READ command • Result (data from memory) appears on data bus • Data from data bus copied into MBR • PC incremented by 1 (in parallel with data fetch from memory) • Data (instruction) moved from MBR to IR • MBR is now free for further data fetches

  8. Fetch Sequence (symbolic) • t1: MAR <- (PC) • t2: MBR <- (memory) • PC <- (PC) +1 • t3: IR <- (MBR) • (tx = time unit/clock cycle) • or • t1: MAR <- (PC) • t2: MBR <- (memory) • t3: PC <- (PC) +1 • IR <- (MBR)

  9. ElemenDasarProsesor • ALU • Register • Internal Data Path • External Data Path • Control Unit

  10. TipeOperasiMikro • Mendefinisikanelemendasarprosesor • Mendiskripsikanoperasimikroyangharusdilakukanprosesor • MenentukanfungsiControlUnit yang harusdilakukanprosesor

  11. JENIS SINYAL KONTROL • Clock • Instruction Register • Tags • PadaBUSKendali • PadaOuputdalamCPU • MelaluiBUSKendali

  12. FUNGSI CONTROL UNIT : 1. Sequencing (mengurutkanoperasi) 2. Mengeksekusi JENIS CONTROL UNIT : • Control Unit Microprogrammed - Control Vertikal - Control Horizontal 2. Control Unit Konvensional/Hard-Wired

  13. KOMPONEN-KOMPONEN POKOK CONTROL UNIT MICROPROGRAMMED : 1. Instruction Register 2. Control Store berisi micro programmed 3. Address Computing Circuiting 4. Micro programmed Counter 5. Micro instruction Buffer 6. Micro instruction Decoder

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