the PCI Bus demystified phần 5 pps

... MHz, the specification places limits on the trace length of PCI signals on expansion boards. The 32-bit interface signals are limited to 1 .5& quot; from the top edge of the connector to the PCI ... connecting to the PCI align exactly with the PCI connector pinout as shown in Figure 5- 12. This contributes to shorter, more consistent stub lengths. PCI Bus Demysti...

Ngày tải lên: 07/08/2014, 11:22

... 3 PCI- PCI Bridge 2 PCI- PCI Bridge 4 PCI- PCI Bridge 5 PCI Bus 2 PCI Bus 4 PCI Bus 5 Pri Bus Sec Bus Sub Bus Bridge 0 Bridge 1 Bridge 2 Bridge 3 Bridge 4 Bridge 5 0 1 0 3 3 0 1 2 3 4 5 5 2 2 5 4 5 127 PCI Bridging PCI- to -PCI ... sees the transaction. Bridge 3 passes the transaction Figure 8 -5: Bus number registers. Host Bridge 0 CPU Host Bus P...

Ngày tải lên: 07/08/2014, 11:22

... insertion event the system activates the software connection process for the inserted board. For an extraction event the system activates the PCI Bus Demystified 1 75 the active bus. Note that there is ... termination of the bus signals. CompactPCI 169 ■ Power up the slot ■ Deassert RST# and connect the slot to the bus, in either order. ■ Change the optional s...

Ngày tải lên: 07/08/2014, 11:22

... Gnd 70 +Vio (1) AD[60] PCI Bus Demystified PCI Connector (continued) 71 AD [59 ] AD [58 ] 72 AD [57 ] Gnd 73 Gnd AD [56 ] 74 AD [55 ] AD [54 ] 75 AD [53 ] +Vio (1) 76 Gnd AD [52 ] 77 AD [51 ] AD [50 ] 78 AD[49] Gnd 79 ... details, 150 – 154 specifications, 149– 150 Index Click the page number to go to that page. 192 49 M66EN AD[09] 50 3.3V: Gnd 51 5V: Keyway 52 AD[08] C/BE[...

Ngày tải lên: 07/08/2014, 11:22

... monopolize the bus. This violates the low-latency spirit of the PCI spec. On the other hand, the specification does allow the notion of bus parking.” The arbiter may be designed to “park” the bus on ... While the choice of a default master is up to the system designer, the specification recommends parking on the last master that acquired the bus. PCI Bus...

Ngày tải lên: 07/08/2014, 11:22

... immediately issues a retry to the master and begins executing the transaction internally. This allows the bus to be used by other masters while the target is busy. PCI Bus Demystified 39 least significant ... phase, another higher priority master may request the bus causing the arbiter to remove GNT# from the agent in the process of stepping. Since the stepping age...

Ngày tải lên: 07/08/2014, 11:22

... the PCI pins and not to the voltage that powers the board. The motherboard (including connectors) defines the signaling environment for the bus, whether it be 5V or 3.3V. A 5V expansion board is ... µA6 leakage V cc off or floating 76 PCI Bus Demystified Figure 5- 4: Characteristic V/I curves for a PCI driver in the 5V signaling environment. Figure 5- 5: Specified...

Ngày tải lên: 07/08/2014, 11:22

... first write the data to the VPD Data field, then write the address to the VPD Address field setting F to 1. After the device has written the data to storage it sets F to 0. PCI Bus Demystified Figure ... the number of the last PCI bus segment in the system. Segments are numbered sequentially from 0 to the value returned in CL. Find PCI Device/Class This pair of...

Ngày tải lên: 07/08/2014, 11:22

... and J5 can also be used for things like a second CompactPCI bus, STD 32 or VME. The Telephony specification makes use of J4 and J5 (see Figure 9-4). PCI Bus Demystified Figure 9-4: Compact PCI ... conformance with PCI specs. Connector The basic CompactPCI pin-and-socket connector is organized as 47 rows of 5 pins each (see Figure 9-3). The pins are on the backplane; the...

Ngày tải lên: 07/08/2014, 11:22

... CompactPCI 148 Why CompactPCI? 148 Mechanical Implementation 150 Electrical Implementation 155 CompactPCI Bridging 162 Summary 1 65 vii Contents This is a blank page. 10 The VESA Local Bus The VESA ... 1.0 ■ Small PCI Spec., Rev. 1.5a ■ PCI BIOS Spec., Rev. 2.1 PCI Bus Demystified 14 System CLK Provides timing for all PCI transactions and is an input to every PCI device...

Ngày tải lên: 07/08/2014, 11:22