1 / 13

Memory Interface

Memory Interface. A Course in Microprocessor Electrical Engineering Dept. University of Indonesia. Jenis – jenis memori. ROM EEPROM SRAM DRAM. Pin Memori. Pin Address Pin Data Pin Selection Pin Kontrol. Ilustrasi secara logika memori RAM 16 K x 8 (16 Kbyte):.

trevor
Download Presentation

Memory Interface

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Memory Interface A Course in Microprocessor Electrical Engineering Dept. University of Indonesia

  2. Jenis – jenismemori • ROM • EEPROM • SRAM • DRAM

  3. Pin Memori • Pin Address • Pin Data • Pin Selection • Pin Kontrol

  4. Ilustrasisecaralogikamemori RAM 16 K x 8 (16 Kbyte): Ilustrasifisik, memori RAM 16 K x 8 : 8 pin data Address 16 K Address 16 K Pin kontrol Pin select 8 bit data

  5. Decoding Memori • Fungsinya: • Menghubungkan µP dengan > 1 memori • Mengatasiketidakcocokanjumlah pin (∑ pin µP > ∑ pin memoriatau I/O) ex : 8088 (20 pin) dengan EPROM 2716 (11 pin)

  6. Decoder NAND Sederhana • Fungsi : jika pin mikroprosesor > pin memori, makamikroprosesorhanyabisamengaksessebanyak pin dimemori, padahal yang terlihatolehmikroprosesorsebanyak pin mikroprosesor, halinitidakkonsistensehinggamemerlukan NAND Gate • Cara hubungan pin : pin mikroprosesorsebanyakjumlah pin memoridihubungkanlangsung, sisanyadihubungkanke NAND. Output dari NAND dijadikan select input • Contoh : EPROM 2K x 8 (2716)

  7. Contoh : EPROM 2K x 8 (2716) A0 A10 A11 A19 RD

  8. b. Dekoder3-to-8 (34LS138) • Tipe 34LS138 adalahactive low, sehingga pin yang aktifnilainya ‘0’, sedangkan yang tidakaktifdiberinilai ‘1’. 8 Selection input 8 output 3 Enable input Input dalam bit : C B A Output sesuaikonversibiner-digital: 0 0 0 = 0 pin 0 aktif 0 1 0 = 2 pin 2 aktif

  9. c. Dekoder3-to-8 (34LS138)

  10. Contoh • Hubungkanlah 8 buah RAM yang masing-masingberukuran 32 K byte (32K x 8) kemikroprosesor 8088 dangambarkanrangkaiannya!! • Jikaalamataksesdimulaidari 00000H, berapaalamatakhirnya??

  11. Latihan • Hubungkan 16 buah ROM yang masing-masingberukuran 8 K x 8 kemikroprosesor 8088. Jikaalamatdimulaidari 40000H, berapaalamatakhirnya? Gunakanlah 1 buah decoder 2 to 4 dan 2 buah decoder 3 to 8.

More Related