參數(shù)資料
型號: TMX320VC5509AGHH
廠商: Texas Instruments, Inc.
元件分類: 數(shù)字信號處理
英文描述: TMS320VC5509A Fixed-Point Digital Signal Processor
中文描述: TMS320VC5509A定點數(shù)字信號處理器
文件頁數(shù): 49/144頁
文件大?。?/td> 1603K
代理商: TMX320VC5509AGHH
Functional Overview
49
November 2002 Revised January 2005
SPRS205D
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 313); the direction register, EHPIGPIODIR, determines if the GPIO
enabled pin is an input or output (Figure 314); and the data register, EHPIGPIODATA, determines the logic
states of the pins in GPIO mode (Figure 315).
15
6
5
4
3
2
1
0
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 313. EHPI GPIO Enable Register (EHPIGPIOEN) Bit Layout
Table 314. EHPI GPIO Enable Register (EHPIGPIOEN) Bit Functions
BIT
NO.
BIT
NAME
RESET
VALUE
FUNCTION
156
Reserved
0
Reserved
50
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
5
4
3
2
1
0
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 314. EHPI GPIO Direction Register (EHPIGPIODIR) Bit Layout
Table 315. EHPI GPIO Direction Register (EHPIGPIODIR) Bit Functions
BIT
NO.
BIT
NAME
RESET
VALUE
FUNCTION
156
Reserved
0
Reserved
50
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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