参数资料
型号: DS3131
厂商: MAXIM INTEGRATED PRODUCTS INC
元件分类: Telecom IC:Other
英文描述: SPECIALTY TELECOM CIRCUIT, PBGA256
封装: 27 X 27 MM, PLASTIC, BGA-256
文件页数: 27/174页
文件大小: 1261K
代理商: DS3131
DS3131
122 of 174
10.1.1 PCI Read Cycle
A read cycle on the PCI bus is shown in Figure 10-2. During clock cycle #1, the initiator asserts the
PFRAME signal and drives the address onto the PAD signal lines and the bus command (which would be
a read) onto the PCBE signal lines. The target reads the address and bus command and, if the address
matches its own, it then asserts the PDEVSEL signal and begins the bus transaction. During clock cycle
#2, the initiator stops driving the address onto the PAD signal lines and switches the PCBE signal lines
to indicate byte enables. It also asserts the PIRDY signal and begins monitoring the PDEVSEL and
PTRDY signals. During clock cycle #4, the target asserts PTRDY, indicating to the initiator that valid
data is available to be read on the PAD signal lines by the initiator. During clock cycle #5, the target is
not ready to provide data #2 because PTRDY is deasserted. During clock cycle #6, the target again
asserts PTRDY, informing the initiator to read data #2. During clock cycle #7, the initiator deasserts
PIRDY, indicating to the target that it is not ready to accept data. During clock cycle #8, the initiator
asserts PIRDY and acquires data #3. Also during clock cycle #8, the initiator deasserts PFRAME,
indicating to the target that the bus transaction is complete and no more data needs to be read. During
clock cycle #9, the target deasserts PTRDY and PDEVSEL and the initiator deasserts PIRDY.
The PXAS, PXDS, and PXBLAST signals are not part of a standard PCI bus. These PCI extension
signals are unique to the device and are useful in adapting the PCI bus to a proprietary bus scheme. They
are only asserted when the device is a bus master.
Figure 10-2. PCI Bus Read
12345678910
data #3
Address
CMD
Byte Enable #1
PCLK
PFRAME
PAD
PCBE
PIRDY
PTRDY
PDEVSEL
PXDS
PXAS
PXBLAST
data #1
data #2
BE #2
BE #3
相关PDF资料
PDF描述
DS3134 DATACOM, FRAMER, PBGA256
DS3150QN DATACOM, PCM TRANSCEIVER, PQCC28
DS3150Q DATACOM, PCM TRANSCEIVER, PQCC28
DS3150TN DATACOM, PCM TRANSCEIVER, PDIP48
DS3150T DATACOM, PCM TRANSCEIVER, PQFP48
相关代理商/技术参数
参数描述
DS3131DK 功能描述:通信集成电路 - 若干 RoHS:否 制造商:Maxim Integrated 类型:Transport Devices 封装 / 箱体:TECSBGA-256 数据速率:100 Mbps 电源电压-最大:1.89 V, 3.465 V 电源电压-最小:1.71 V, 3.135 V 电源电流:50 mA, 225 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube
DS3134 功能描述:IC CTRLR HDLC CHATEAU 256-BGA RoHS:否 类别:集成电路 (IC) >> 接口 - 控制器 系列:- 标准包装:4,900 系列:- 控制器类型:USB 2.0 控制器 接口:串行 电源电压:3 V ~ 3.6 V 电流 - 电源:135mA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:36-VFQFN 裸露焊盘 供应商设备封装:36-QFN(6x6) 包装:* 其它名称:Q6396337A
DS-313PIN 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Miscellaneous
DS-313-PIN 功能描述:信号调节 RoHS:否 制造商:EPCOS 产品:Duplexers 频率:782 MHz, 751 MHz 频率范围: 电压额定值: 带宽: 阻抗:50 Ohms 端接类型:SMD/SMT 封装 / 箱体:2.5 mm x 2 mm 工作温度范围:- 30 C to + 85 C 封装:Reel
DS31400 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:8-Input, 14-Output, Dual DPLL Timing IC with Sub-ps Output Jitter