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TMS320DM642 Datasheet(PDF) 65 Page - Texas Instruments |
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TMS320DM642 Datasheet(HTML) 65 Page - Texas Instruments |
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65 / 178 page  www.ti.com 3.6 Debugging Considerations TMS320DM642 Video/Imaging Fixed-Point Digital Signal Processor SPRS200J – JULY 2002 – REVISED AUGUST 2005 Table 3-8. DM642 Device Multiplexed Pin Configurations(1) (continued) MULTIPLEXED PINS DEFAULT DEFAULT DESCRIPTION FUNCTION SETTING NAME NO. By default, HPI is enabled upon reset (PCI is disabled). To enable the PCI peripheral, an external pullup resistor HD[23,15:0]/AD[23,15:0] (2) HD[23, 15:0] PCI_EN = 0 (disabled)(1) (1 k Ω) must be provided on the PCI_EN pin (setting PCI_EN = 1 at reset). HD31/AD31/MRCLK G1 HD31 HD30/AD30/MCRS H3 HD30 HD29/AD29/MRXER G2 HD29 HD28/AD28/MRXDV J4 HD28 HD27/AD27/MRXD3 H2 HD27 By default, HPI is enabled upon reset (PCI is disabled). HD26/AD26/MRXD2 J3 HD26 To enable the PCI peripheral, an external pullup resistor HD25/AD25/MRXD1 J1 HD25 PCI_EN = 0 (disabled)(1) (1 k Ω) must be provided on the PCI_EN pin (setting HD24/AD24/MRXD0 K4 HD24 MAC_EN = 0 PCI_EN = 1 at reset). (disabled)(1) HD22/AD22/MTCLK L4 HD22 To enable the EMAC peripheral, an external pullup resistor (1 k Ω) must be provided on the MAC_EN pin (setting HD21/AD21/MCOL K2 HD21 MAC_EN = 1 at reset). HD20/AD20/MTXEN L3 HD20 HD19/AD19/MTXD3 L2 HD19 HD18/AD18/MTXD2 M4 HD18 HD17/AD17/MTXD1 M2 HD17 HD16/AD16/MTXD0 M3 HD16 It is recommended that external connections be provided to device configuration pins, including TOUT1/LENDIAN, AEA[22:19], GP0[3]/PCIEEAI, VDAC/GP0[8]/PCI66, HD5/AD5, PCI_EN, and TOUT0/MAC_EN. Although internal pullup/pulldown resistors exist on these pins, providing external connectivity adds convenience to the user in debugging and flexibility in switching operating modes. Internal pullup/pulldown resistors also exist on the non-configuration pins on the AEA bus (AEA[18:0]). Do not oppose the internal pullup/pulldown resistors on these non-configuration pins with external pullup/pulldown resistors. If an external controller provides signals to these non-configuration pins, these signals must be driven to the default state of the pins at reset, or not be driven at all. For the internal pullup/pulldown resistors for all device pins, see the terminal functions table. Device Configurations 65 |
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