the PCI Bus demystified phần 10 pps

... Res Gnd Res 19 Gnd Gnd Res Res Res 18 Bus Res Bus Res Bus Res Gnd Bus Res 17 Bus Res Gnd PRST# REQ6# (3) GNT6# (3) 16 Bus Res Bus Res DEG# Gnd Bus Res 15 Bus Res Gnd FAL# REQ5# (3) GNT5# (3) 14 ... 125–128 host to PCI, 125–126 interrupt handling, 136–137 PCI to legacy bus, 126 PCI to PCI, 127 prefetching, 106 107 , 135–136 posting, 136 resource locking, 142–146 V...

Ngày tải lên: 07/08/2014, 11:22

... Vendor ID: Identifies the vendor of the device. More specifically, it identifies the vendor of the PCI silicon. PCI Bus Demystified Figure 6-3: Type 0 configuration header. 91 PCI supports two signaling ... 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" from the top...

Ngày tải lên: 07/08/2014, 11:22

... bridge hierarchy. Host -PCI Bridge Memory CPU Host Bus PCI Device PCI- PCI Bridge 1 PCI- ISA Bridge PCI- PCI Bridge 2 PCI Device PCI Device PCI Bus 0 ISA Bus PCI Bus 1 PCI Bus 2 PCI Option Card Cache Legacy Device 137 Chances ... sees the transaction. Bridge 3 passes the transaction Figure 8-5: Bus number registers. Host Bridge 0 CPU Host Bus PCI Device...

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 175 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 slo...

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

... to the signal level on 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. ... ACK64#. PCI Bus Demystified 60 supply the interrupt vector. The C/BE# bus indicates which bytes of the interrupt vector are valid. Because PCI is processor independ...

Ngày tải lên: 07/08/2014, 11:22

... An extension of the Device ID (Subsystem ID) in the Configuration Header. EC EC Level. Identifies the Engineering Change Level of the board. 110 PCI Struct Len: The length of the PCI data structure ... information. Finally, the last two bytes of the header are a pointer to a PCI data structure. The reference point for this pointer is the beginning of the ROM imag...

Ngày tải lên: 07/08/2014, 11:22

... allows a PCI system to expand beyond the electrical limits of a single bus segment. Bridges also serve to interface the host processor to PCI (host-to -PCI bridge) and to interface PCI to legacy busses ... 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 connector allocation....

Ngày tải lên: 07/08/2014, 11:22

... detail. Figure 1-2: Functional diagram of the VL Bus. The VL Bus solved the bandwidth problem (in the short term anyway). On a 33 MHz, 32-bit processor bus, the VL Bus could achieve 132 Mbytes/sec. 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...

Ngày tải lên: 07/08/2014, 11:22