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: 71/130页
文件大小: 1782K
代理商: RPIXP2850BB
Intel IXP2800 and IXP2850 Network Processors
Signal Description
Datasheet
45
PCI
PCI_PAR
Low = Central
High = Non-Central
Central Function:
During PCI reset (PCI_RST_L =0), the
network processor needs to drive PCI
AD[31:0] and PCI_BE[3:0], PCI_PAR.
In addition, The rest of the I/O devices
will be in three states.
After PCI_RST_L is deasserted, the
network processor will drive these I/O
devices (PCI_AD[31:0], PCI_BE[3:0],
PCI_PAR) to three states unless the
network processor owns the grant.
Non-Central Function:
During PCI reset (PCI_RST_L =0), the
network processor needs to drive all
the I/O devices to three states. Once
the network processor owns the bus
(grant), the network processor needs
to drive these I/O devices
PCI_AD[31:0], PCI_BE[3:0], and
PCI_PAR to known values.
PCI
PCI_PAR64
High-Z
Need external pullup.
PCI
PCI_FRAME_L
High-Z
PCI
PCI_IRDY_L
High-Z
PCI
PCI_TRFY_L
High-Z
PCI
PCI_STOP_L
High-Z
PCI
PCI_DEVSEL_L
High-Z
PCI
PCI_IDSEL
High-Z
PCI
PCI_REQ64_L
Low = Central
High-Z =
Non_Central
Central Function:
During PCI reset (PCI_RST_L =0), the
network processor needs to drive
PCI_Req64L low.
PCI
PCI_ACK64_L
High-Z
PCI
PCI_PERR_L
High-Z
PCI
PCI_SERR
High-Z
PCI
PCI_REQ_L(0)
High-Z
PCI
PCI_REQ_L(1)
High-Z
PCI
PCI_GNT_L(0)
High-Z
PCI
PCI_GNT_L(1)
High-Z
PCI
PCI_INTA_L
High-Z
PCI
PCI_INTB_L
High-Z
PCI
PCI_RST_L
Input
PCI
PCI_CLK
Input
PCI
PCI_M66EN
Input
PCI
PCI_ZQ1,
PCI_ZQ2
Input
GPIO
GPIO[7:0]
High Z
Table 17. Pin State During Reset (Sheet 3 of 4)
Function
Pin name
Initial Values
Comment
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