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TNETV2501INPGF 数据表(PDF) 94 Page - Texas Instruments |
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TNETV2501INPGF 数据表(HTML) 94 Page - Texas Instruments |
94 / 197 page Functional Overview 94 December 2002 − Revised November 2008 SPRS206K 3.11.2 Parallel Port General-Purpose I/O (PGPIO) Four address pins (A[21:18]), 16 data pins (D[31:16]), 16 control signals (C[15:0]), 8 host data pins (HD[7:0]), and 2 HPI control pins (HC0, HC1) can be individually enabled as PGPIO when the Parallel/Host Port Mux Mode bit field of the External Bus Selection Register (XBSR) is cleared for PGPIO mode (see Table 3−35). These pins are controlled by three sets of registers: the PGPIO enable registers, the PGPIO direction registers, and the PGPIO data registers. • The PGPIO enable registers PGPIOEN0−PGPIOEN2 (see Figure 3−34, Figure 3−37, and Figure 3−40) determine if the output function of the PGPIO pins is enabled or disabled. • The PGPIO direction registers PGPIODIR0−PGPIODIR2 (see Figure 3−35, Figure 3−38, and Figure 3−41) determine if corresponding bits in the PGPIO data registers specify an output value or an input value. • The PGPIO data registers PGPIODAT0−PGPIODAT2 (see Figure 3−36, Figure 3−39, and Figure 3−42) store the value read or written externally. To use a PGPIO pin as an output, its corresponding bit must be set to 1 in both the enable and direction registers. The state of the pin is then controlled through its bit in the data register. Conversely, to use a PGPIO pin as an input, its corresponding bit must be cleared to 0 in both the enable and the direction registers. The state of the pin can then be read from its bit in the data register. NOTE: The enable registers PGPIOENn cannot override the External Bus Selection Register (XBSR) setting. Table 3−35. TMS320VC5501 PGPIO Cross-Reference PIN PARALLEL/HOST PORT MUX MODE = 0 (PGPIO) PARALLEL/HOST PORT MUX MODE = 1 (FULL EMIF) EMIF Address Bus A[21:18] PGPIO[3:0] EMIF.A[21:18] EMIF Data Bus D[31:16] PGPIO[19:4] EMIF.D[31:16] EMIF Control Bus C0 PGPIO20 EMIF.ARE/SADS/SDCAS/SRE C1 PGPIO21 EMIF.AOE/SOE/SDRAS C2 PGPIO22 EMIF.AWE/SWE/SDWE C3 PGPIO23 EMIF.ARDY C4 PGPIO24 EMIF.CE0 C5 PGPIO25 EMIF.CE1 C6 PGPIO26 EMIF.CE2 C7 PGPIO27 EMIF.CE3 C8 PGPIO28 EMIF.BE0 C9 PGPIO29 EMIF.BE1 C10 PGPIO30 EMIF.BE2 C11 PGPIO31 EMIF.BE3 C12 PGPIO32 EMIF.SDCKE C13 PGPIO33 EMIF.SOE3 C14 PGPIO34 EMIF.HOLD C15 PGPIO35 EMIF.HOLDA |
类似零件编号 - TNETV2501INPGF |
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类似说明 - TNETV2501INPGF |
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