- 您现在的位置：买卖IC网 > Sheet目录1203 > COREPCIF-RM (Microsemi SoC)IP MODULE COREPCIF
Clock and Reset Networks
Clock and Reset Networks
The core includes global buffers for both the PCI clock and reset inputs. The buffered versions of these signals are
provided on the CLK_OUT and RST_OUTN ports. These should be used for clocking and resetting any additional
logic included in the FPGA running of the PCI clock.
The core also uses two additional global resources for internal routing of the high-fanout TRDYN and IRDYN nets, if
required. Target cores will require IRDYN to be routed on a global; if the Master function is implemented, the TRDYN
net will be routed on a global network.
In SX-A and RTSX-S implementations with both Master and Target functions enabled, the reset network is demoted to
a normal buffer tree, as there are only three global resources available in these devices. They are required for the clock
and the TRDYN and IRDYN nets.
Assigning Pin Layout Constraints
You can assign pins manually with the PinEditor tool or import them directly into Designer from the corresponding pin
constraint file. The pin file will be a PIN, GCF, or PDC file, depending on the FPGA family being used.
Pin Assignments
To be able to meet the critical PCI setup, hold, and clock-to-out requirements, it is critical that the PCI pin locations be
assigned correctly. Two aspects need to be considered:
1.
2.
Pin assignments should minimize FPGA place-and-route issues. Pin assignment is extremely important in meeting
the PCI setup, hold, and clock-to-out requirements.
Pin assignments should minimize PCB layout issues. The PCI specification limits the track lengths allowed on the
PCB. Chapter 4 of the PCI specification details the requirements.
The PCI specification recommends that the pin order around the device align exactly with the add-in card (connector)
pinout. The additional signals needed in 64-bit versions of the bus continue wrapping around the component in a
counterclockwise direction in the same order they appear on the 64-bit connector extension. “PCI Pinout ” on page 135
provides details of the recommended pin order.
Example pin files are provided in the layout directory for some of the possible FPGA family, device, and package
combinations. These can be adapted to support other device/package combinations.
Each supported FPGA family has different requirements to minimize FPGA layout issues; these are detailed below.
SX-A and RTSX-S Families
The pins should be located around one side of the package in the order specified by the PCI specification. The pins
should be located on the same side of the package where CLKA and CLKB are located.
1.
2.
3.
Locate TRDYN and IRDYN close to the CLKA and CLKB pins, but do not use these pins.
Assign the rest of the PCI pins around the package in the order that will match the add-in connector. Do not use
any of the CLK, QCLK, or HCLK pins.
Connect the PCI CLK to the HCLK pin.
ProASIC PLUS Family
The pins should be located around one side of the package in the order specified by the PCI specification. The pins
should be located on the west side of the die (in the pin editor, these pins will be identified by a “W ” on the pin),
depending on the package type. This may be the left or right side of the package.
1.
Locate TRDYN and IRDYN close to the GL inputs.
v4.0
129
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
COREU1LL-AR
IP MODULE COREU1LL
COREU1PHY-AR
IP MODULE COREU1PHY
CORR-8BIT-XM-UT2
SITE LICENSE IP CORRELATOR XP
CP2-GSA-L
CONN SHIELD LOWER TYPE A 22
CP2-HSA110-1
CONN SHROUD CPCI 2MM TYPE A 22
CP2-HSC055-4
CONN SHROUD CPCI 2MM TYPE C 11
CP2-K3567-SR-F
COMPACT PCI - MISC
CP2105EK
KIT EVAL FOR CP2105
相关代理商/技术参数
COREPCIF-RMFL
功能描述:IP MODULE 制造商:microsemi corporation 系列:- 零件状态:在售 类型:许可证 应用:- 版本:- 许可长度:- 许可 - 用户明细:- 操作系统:- 配套使用产品/相关产品:Microsemi 器件 媒体分发类型:- 标准包装:1
COREPCIF-UR
功能描述:HW/SW/OTHER 制造商:microsemi corporation 系列:* 零件状态:在售 标准包装:1
COREPCI-SN
制造商:ACTEL 制造商全称:Actel Corporation 功能描述:CorePCI v5.41
COREPCI-SR
制造商:ACTEL 制造商全称:Actel Corporation 功能描述:CorePCI v5.41
COREPCI-UR
制造商:ACTEL 制造商全称:Actel Corporation 功能描述:CorePCI v5.41
COREPCI-XX
制造商:ACTEL 制造商全称:Actel Corporation 功能描述:CorePCI v5.41
COREPRO LEDBULB 10.5-60W B
制造商:Philips Lumileds 功能描述:
COREPRO LEDBULB 10.5-60W E
制造商:Philips Lumileds 功能描述: