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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TMS320VC5507 датащи(PDF) 47 Page - Texas Instruments |
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TMS320VC5507 датащи(HTML) 47 Page - Texas Instruments |
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47 / 135 page  Functional Overview 47 April 2004 − Revised January 2005 SPRS244C 3.6.3 EHPI General-Purpose I/O Six control lines of the External Parallel Bus can also be set as general-purpose I/O when the Parallel Port Mode bit field of the External Bus Selection Register is set to Nonmultiplexed EHPI (10) or Multiplexed EHPI mode (11). These pins are controlled by three registers: the enable register, EHPIGPIOEN, determines if the pins serve as GPIO or address (Figure 3−13); the direction register, EHPIGPIODIR, determines if the GPIO enabled pin is an input or output (Figure 3−14); and the data register, EHPIGPIODATA, determines the logic states of the pins in GPIO mode (Figure 3−15). 15 6 543210 Reserved GPIOEN13 GPIOEN12 GPIOEN11 GPIOEN10 GPIOEN9 GPIOEN8 R, 0000 0000 00 R/W, 0 R/W, 0 R/W, 0 R/W, 0 R/W, 0 R/W, 0 LEGEND: R = Read, W = Write, n = value after reset Figure 3−13. EHPI GPIO Enable Register (EHPIGPIOEN) Bit Layout Table 3−12. EHPI GPIO Enable Register (EHPIGPIOEN) Bit Functions BIT NO. BIT NAME RESET VALUE FUNCTION 15−6 Reserved 0 Reserved 5−0 GPIOEN13− GPIOEN8 0 Enable or disable GPIO function of EHPI Control Bus. GPIOENx = 0 GPIO function of GPIOx line is disabled GPIOENx = 1 GPIO function of GPIOx line is enabled 15 6 543210 Reserved GPIODIR13 GPIODIR12 GPIODIR11 GPIODIR10 GPIODIR9 GPIODIR8 R, 0000 0000 00 R/W, 0 R/W, 0 R/W, 0 R/W, 0 R/W, 0 R/W, 0 LEGEND: R = Read, W = Write, n = value after reset Figure 3−14. EHPI GPIO Direction Register (EHPIGPIODIR) Bit Layout Table 3−13. EHPI GPIO Direction Register (EHPIGPIODIR) Bit Functions BIT NO. BIT NAME RESET VALUE FUNCTION 15−6 Reserved 0 Reserved 5−0 GPIODIR13− GPIODIR8 0 Data direction bits that configure the EHPI Control Bus configured as I/O pins as either input or output pins. GPIODIRx = 0 Configure corresponding pin as an input. GPIODIRx = 1 Configure corresponding pin as an output. |
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