Freescale Semiconductor MPC860T user manual Chapter Parallel I/O Ports, Port D Pin Functions

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Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

Chapter 4

Parallel I/O Ports

This chapter shows how to use port D pin multiplexing to support Fast Ethernet controller (FEC) operations.

4.1 Port D Pin Functions

Each of the 13 port D pins is independently conÞgured as a general-purpose I/O pin if the corresponding port D pin assignment register (PDPAR) bit is cleared. Each pin is conÞgured as a dedicated on-chip peripheral pin if the corresponding PDPAR bit is set. Refer to Table 4-1 for the default description of all port D pin options.

When the port pin is conÞgured as a general-purpose I/O pin, the signal direction for that pin is determined by the corresponding control bit in the port D data direction register (PDDIR). The port I/O pin is conÞgured as an input if the corresponding PDDIR bit is cleared; it is conÞgured as an output if the corresponding PDDIR bit is set. All PDPAR bits and PDDIR pins are cleared on total system reset, conÞguring all port D pins as general- purpose input pins.

PD[13:8] peripheral functions (RXD3, TXD3, RXD4, TXD4) are alternately available on PA[11:8]. PD[7:5], and PD12 peripheral functions (RTS3, RTS4, and L1RSYNCB) are alternately available on PC[13:12] and PC6. Functions REJECT3 and REJECT4 are lost when MII mode is used. The peripheral functions L1TSYNCB, L1TSYANCA and L1RSYNCA found on PD[15:13] are alternatively available on PC7, PC5, and PC4.

Note: The reserved bits of the PDPAR must be written with zeros. Failure to do so may result in one or more of the following:

¥No events on SCC3 and SCC4.

¥No events on any CPM peripheral.

¥Pin multiplexing of Port D will not be as expected

MOTOROLAChapter 4. Parallel I/O Ports4-1

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Contents Freescale Semiconductor, Inc MPC860T Rev. D Fast Ethernet ControllerMotorola Literature Distribution Centers Contents Parallel I/O Ports Contents Paragraph Title Number Title Number IllustrationsViii MPC860T Rev. D Fast Ethernet Controller Supplement Tables Number Overview Document Revision HistoryLists signiÞcant changes between revisions of this document Document Revision HistoryComparison with the MPC860 Features1 MPC860TBlock Diagram Fast Ethernet Controller Embedded PowerPC Processor CoreSystem Interface Unit SIU SIU Interrupt ConÞguration Glueless System DesignInc Name Pin Description Signal DescriptionsFEC Signal Descriptions Miimdc L1RSYNCBRXD3 MiitxerMIITXD2 REJECT3REJECT4 MIITXD1Freescale Semiconductor, Inc Signal Description FEC Signal Name MII SignalsTransceiver Connection This chapter discusses the operation of the FECFEC Frame Transmission Serial Mode Connections to the External TransceiverTXD0 RXD0FEC Frame Reception Ethernet Address Recognition FEC Command SetCAM Interface Rcntrlprom = Hash Table AlgorithmCollision Handling Inter-Packet Gap TimeTransmission Errors Ethernet Error-Handling ProcedureReception Errors Internal and External LoopbackReception Errors Port D Pin Functions Chapter Parallel I/O PortsSignal Function Enabling MII ModePort D Registers Shows the port D pin assignmentsCLK Sdma RegistersSdcr Field Descriptions Describes Sdcr ÞeldsFRZ Faid RAID BitsBrießy describes each enter in the FEC parameter RAM Parameter RAMFEC Parameter RAM Memory Map Address Name Description SectionRAM Perfect Match Address Low Register Addrlow RAM Hash Table High Hashtablehigh RAM Perfect Match Address High AddrhighDescribes the Addrlow Þelds Describes the Addrhigh ÞeldsDescribes Hashtablehigh Þelds RAM Hash Table Low HashtablelowHashtablehigh Field Descriptions HashhighBeginning of TxBD Ring Xdesstart Beginning of RxBD Ring RdesstartDescribes Hashtablelow Þelds Describes Rdesstart ÞeldsXdesstart Field Descriptions Receive Buffer Size Register RbuffsizeDescribes Xdesstart Þelds Ethernet Control Register Ecntrl Spare Fecpin Etheren Reset MUXDescribes Rbuffsize Þelds Rbuffsize Field DescriptionsDescribes Ecntrl Þelds Interrupt Event IEVENT/Interrupt Mask Register ImaskEcntrl Field Descriptions FecpinmuxRfint to notify at the end of frame Ethernet Interrupt Vector Register Ivec10. IEVENT/IMASK Field Descriptions Hberr11 describes Ivec Þelds RxBD Active Register Rdesactive11. Ivec Field Descriptions Ilevel12. Rdesactive Field Descriptions TxBD Active Register Xdesactive12 describes Rdesactive Þelds 13. Xdesactive Field Descriptions MII Management Frame Register Miidata13 describes Xdesactive Þelds 14. Miidata Field Descriptions 14 describes Miidata Þelds15 describes Miispeed Þelds MII Speed Control Register Miispeed15. Miispeed Field Descriptions Dispreamble Miispeed17 describes Rbound Þelds Fifo Receive Bound Register Rbound16. Programming Examples for Miispeed Register 17. Rbound Field DescriptionsTransmit Watermark Register Xwmrk Fifo Receive Start Register Rfstart18 describes Rñfstart Þelds 18. Rfstart Field Descriptions19. Xwmrk Field Descriptions Fifo Transmit Start Register Xfstart19 bit Þeld descriptions for Xwmrk 20 describes Xfstart Þelds DMA Function Code Register Funcode20. Xfstart Field Descriptions DATABO0 DATABO1 DESCBO0 DESCBO1 FC1 FC2 FC321 describes Funcode Þelds Receive Control Register Rcntrl21. Funcode Field Descriptions Descbo22 describes Rcntrl Þelds Receive Hash Register Rhash22. Rcntrl Field Descriptions Bcrej22 describes Rhash Þelds Transmit Control Register Xcntrl24 describes Xcntrl Þelds 23. Rhash Field DescriptionsInitialization Sequence User Initialization before Setting EcntrletherenHardware Initialization 25. Hardware InitializationDescriptor Controller Initialization 27. User Initialization before Setting EcntrletherenUser Initialization after Asserting Ecntrletheren Step DescriptionBuffer Descriptors BDs 27. User Initialization after Setting EcntrletherenEthernet Receive Buffer Descriptor RxBD Step27. Receive Buffer Descriptor RxBD Field Description RxBD format is shown in TableRO1 RO2 Data Length RO129 describes TxBD Þelds Ethernet Transmit Buffer Descriptor TxBD29. Transmit Buffer Descriptor TxBD Field Descriptions TO1 TO2 DEF CSLData Xcntrlhbc =Freescale Semiconductor, Inc AC Electrical Characteristics DC Electrical CharacteristicsMII Receive Signal Timing RXD30, RXDV, RXER, Rxclk Electrical SpeciÞcationsMII Receive Signal Timing MII Transmit Signal Timing TXD30, TXEN, TXER, TxclkMII Transmit Signal Timing Num Characteristic Min Max UnitMII Async Inputs Signal Timing MII Async Inputs Signal Timing CRS, COLTxen Txer CRS, COLMII Serial Management Channel Timing Shows the MII serial management channel timing diagramMPC860T Pin Assignments Following pins are marked as spare onFreescale Semiconductor, Inc Freescale Semiconductor, Inc For More Information On This Product