P&I Ch4 - Bus 1
ch 4. I/O Interface bus overview
Giíi thiÖu bus chuÈn cho ghÐp nèi, më réng:
–ISA/ PC-104 – AT bus
–USB (Universal Serial Bus)
–Philips I2C
–PCI (Peripheral Component Interconnect)
–SCSI (Small Computer Systems Interface)
–GPIB (General Purpose Interface Bus)
–Siemens Profibus, ASi bus, Multi Point Buses...
–IEEE 1394
–...
P&I Ch4 - Bus 2
4.0. Kh¸i niÖm vÒ bus:
•PCB (Printed Cirrciut Board), Cable (Copper/
Optic), Slot, Connector...
•Nèi nhiÒu thiÕt bÞ slave [master], dïng chung:
trong 1 thêi ®iÓm chØ cã 1 talker – 1 hoÆc nhiÒu
listener
•Bus song song (n bit) hoÆc nèi tiÕp (I2C, USB,
SSA, Profi, ASi, IEEE 1394...)
•Thµnh phÇn (physical lines/ time sharing):
–Address
–Data
–Control/ Status/Handshake/data check
–[Power supply]
P&I Ch4 - Bus 3
4.1. industry small architecture (isa) bus:
•ISA/ AT bus, 1984, IBM, PC-104 bus, Available in
Pentium, PowerPC Platforms
•§Ó ghÐp thªm c¸c card/ thiÕt bÞ I/O chuÈn víi
Mother Board, 1..12 Slots, hiÖn t¹i c¸c m¸y cã thÓ
kh«ng dïng slot
•8/ 16 bit for data transfers
•4,77 => 8,33 MHz/11.1MHz => 2.75 MWps/5.5 MWps
max, DMA 16.
•Only 1 BusMaster, CPU hoÆc DMAC, w AEN
•No data integrity, kh«ng kiÓm tra parity, IO Check
•Dïng ®Ó ghÐp víi c¸c thiÕt bÞ chËm, kiÓu ký tù:
‘character typed devices’ :keyboard, mouse...
•Refer ‘AT Technical Reference’ or TechHelp for
detail
P&I Ch4 - Bus 4
H×nh 4.1. AT/ ISA/ PC 104 bus
P&I Ch4 - Bus 5
4.2. Universal serial bus - usb: