参数资料
型号: RPIXP2850BB
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 1400 MHz, RISC PROCESSOR, PBGA1356
封装: 37.50 X 37.50 MM, 1 MM PITCH, FCBGA-1356
文件页数: 55/130页
文件大小: 1782K
代理商: RPIXP2850BB
Intel IXP2800 and IXP2850 Network Processors
Signal Description
30
Datasheet
3.2.3
Media and Switch Fabric Interface (MSF)
The Media and Switch Fabric Interface is used to interface the network processor to SPI-4 PHY
chips, CSIX Switch Fabrics, and to other network processors. MSF uses IEEE LVDS signaling
levels for clock, data, control, and parity. The status channel and its clock use LVTTL signaling., or
alternatively, can be configured to use LVDS I/O.
VREF_QDR0,
VREF_QDR1,
VREF_QDR2,
VREF_QDR3
I
HSTL Reference Voltage.
8
QDR0_ZQ(0)
QDR0_ZQ(1)
QDR1_ZQ(0)
QDR1_ZQ(1)
QDR2_ZQ(0)
QDR2_ZQ(1)
QDR3_ZQ(0)
QDR3_ZQ(1)
I
Impedance Match. The QDRn_ZQ(0) pin for each channel
should be connected to GND through a 50-ohm resistor. The
QDRn_ZQ(1) pins for each channel should be connected to
VDDQ (1.5 V) through a 50-ohm resistor. Internal circuits match
the impedance of the output drivers to the value of this resistor.
Note: the nominal value is 50 ohms, and the resistor range is 25
to 65 ohms. The resistor tolerance is +/- 1%.
8
Total
321
Table 6.
SRAM Signals (Sheet 7 of 7)
Signal Name
I/O
Description
Number
Table 7.
MSF Data Signals (Sheet 1 of 4)
Signal Name
I/O
Type
SPI-4 Use
CSIX Use
Description
Number
SPI4_RCLK_H,
SPI4_RCLK_L
I
LVDS
RDCLK
TxClk
Receive Clock. Used to register
RDAT, RCTL, RPAR and RPROT.
2
SPI4_RCLK_REF_H,
SPI4_RCLK_REF_L
O
LVDS
RCLK_REF
Receive Clock Reference. Buffered
version of RCLK.
2
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