USB:
- (full-speed signaling bit rate) 12 /
5
(low-speed signaling bit rate) 1.5 /
3
( ) 127
, SCSI
5
500 mA
USB 1.1 2.0
USB , . . | USB » |
USB .
VBUS | ||
D- | ||
D+ | ||
GND | |
:
GND
V BUS +5V
D+
D- .
USB 2.0
USB 2.0 480 / (60 /), (~33,5 / ). USB . , FireWire, 400 /, 80 / (10 /) , USB 2.0, ́ . USB 2.0.
USB 3.0 ( 5 /), 10 . . . . , ( ). ( , 3-6 ). USB 3.0, (, ) , , , USB 2.0. , . USB 3.0 900 , USB 2.0 500 . , USB 3.0, , , . . ( 3 ), USB 2.0. , USB . , , USB 3.0 , . .
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VME.
VMEbus (VersaModule Eurocard bus) ( VME) , Motorola 68000, . VME IEC ANSI/IEEE 10141987. VME . 1981, VME .
32/64
/ (VME32), (VME64)
3U, 6U, 9U
21
32 40 / (VME32), 80 / (VME64)
( 1- ) 320 / (VME64).
VMEbus 68000, . , , . , 68000 , 32- , VME .
68000, VME , 32-. , VME, 68000 24- 16- ( 32-), VME 32- . , , : P1 P2. P1 32 , 24 16- , . P2 ; 8 16 .
VME :
. . .
, arbitration bus. , , 1 , arbiter module. , bus request in arbitration bus (. 0) , . , bus request in, , - . , bus busy , , bus grant out .
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. , , , address strobe data strobe, , , write . , data strobe, : 8, 16 32 ( 64 VME64). , , data transfer acknowledge ( bus error). , read . data strobe . , , ( , , PCI).
VME ( 68000). , , . , , . , 68000, VME .
CAN.
CAN
(Control Area Network)
CAN (Control Area Network) - , "" /, . , , , . CAN , , BOSH , . .
ISO 11898 | |
1 / () | |
1000 () | |
, | , |
, |
. , . , .
1 /. , , .
, | ||||||||
, / |
, . , PHILIPS PCA82C250 110.
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CAN . , , . , . .
CAN . , , CRC-, , . d=6. 4.7x10-11.
CAN "" .
CAN . , , .. .
, CAN, .