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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TMS320DM641 датащи(PDF) 68 Page - Texas Instruments |
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TMS320DM641 датащи(HTML) 68 Page - Texas Instruments |
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68 / 171 page  Device Configurations 68 June 2003 − Revised August 2004 SPRS222C 2 Device Configurations On the DM641/DM640 device, bootmode and certain device configurations/peripheral selections are determined at device reset, while other device configurations/peripheral selections are software-configurable via the peripheral configurations register (PERCFG) [address location 0x01B3F000] after device reset. 2.1 Configurations at Reset For proper device operation; the following external pins must be configured correctly: • For proper DM641 device operation, the HD5 [pin Y1] at device reset must be pulled down via a 10-k Ω resistor. • For proper DM641/DM640 device operation, the reserved (RSV) [E2] pin at device reset must be pulled down via a 10-k Ω resistor. • For proper DM641/DM640 device operation, the GP0[0] [pin M5] (IPD) must remain low at device reset. 2.1.1 Peripheral Selection at Device Reset On the DM641/DM640 devices there are NO peripherals sharing the same pins (internally muxed, yet mutually exclusive) that are controlled via external pins. • EMAC and MDIO peripherals The MAC_EN pin is latched at reset. This pin determines specific peripheral selection, summarized in Table 2−1. Table 2−1. MAC_EN Peripheral Selection (EMAC and MDIO) PERIPHERAL SELECTION PERIPHERALS SELECTED MAC_EN Pin [C5] HPI Data (16-Bit) [DM641 Only] EMAC and MDIO 0 √ Disabled 1 √ √ |
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