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KMPC8568VTAUGGA Datasheet(PDF) 8 Page - Freescale Semiconductor, Inc |
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KMPC8568VTAUGGA Datasheet(HTML) 8 Page - Freescale Semiconductor, Inc |
8 / 139 page MPC8568E/MPC8567E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 1 8 Freescale Semiconductor MPC8568E Overview 1.2.9 High Speed I/O Interfaces The MPC8568E supports two high-speed I/O interface standards: serial RapidIO and PCI Express. It can be configured as x1/x4 SRIO and 1x/2x/4x PCI Express simultaneously with the following limitation: • Both SRIO and PCI-Express are limited to use the same clock and are limited to 2.5G. • Spread spectrum clocking can not be used because SRIO doesn't support this (PCI-Express does support it). If x8 PCI Express is needed, then SRIO is not available due to the pin multiplex limitation. 1.2.10 Serial RapidIO The serial RapidIO interface is based on the RapidIO Interconnect Specification, Revision 1.2. RapidIO is a high-performance, point-to-point, low-pin-count, packet-switched system-level interconnect that can be used in a variety of applications as an open standard. The RapidIO architecture has a rich variety of features including high data bandwidth, low-latency capability, and support for high-performance I/O devices, as well as support for message-passing and software-managed programming models. Key features of the serial RapidIO interface unit include: • Support for RapidIO Interconnect Specification, Revision 1.2 (all transaction flows and priorities) • Both 1x and 4x LP-serial link interfaces, with transmission rates of 1.25, 2.5, and 3.125 Gbaud (data rates of 1.0, 2.0, and 2.5 Gbps) per lane • Auto detection of 1x or 4x mode operation during port initialization • 34-bit addressing and up to 256-byte data payload • Receiver-controlled flow control • Support for RapidIO error injection The RapidIO messaging unit supports two inbox/outbox mailboxes (queues) for data and one doorbell message structure. Both chaining and direct modes are provided for the outbox, and messages can hold up to 16 packets of 256 bytes, or a total of 4 Kbytes. 1.2.11 PCI Express Interface The MPC8568E supports a PCI Express interface compatible with the PCI Express Base Specification Revision 1.0a. It is configurable at boot time to act as either root complex or endpoint.The physical layer of the PCI Express interface operates at a 2.5-Gbaud data rate per lane. Other features of the PCI Express interface include: • x8, x4, x2, and x1 link widths supported • Selectable operation as root complex or endpoint • Both 32- and 64-bit addressing and 256-byte maximum payload size • Full 64-bit decode with 32-bit wide windows |
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