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): 46/144頁
文件大?。?/td> 1603K
代理商: TMX320VC5509AGHH
Functional Overview
46
November 2002 Revised January 2005
SPRS205D
3.6
General-Purpose Input/Output (GPIO) Ports
3.6.1 Dedicated General-Purpose I/O
The 5509A provides eight dedicated general-purpose input/output pins, GPIO0GPIO7. Each pin can be
indepedently configured as an input or an output using the I/O Direction Register (IODIR). The I/O Data
Register (IODATA) is used to monitor the logic state of pins configured as inputs and control the logic state
of pins configured as outputs. See Table 331 for address information. The description of the IODIR is shown
in Figure 38 and Table 39. The description of IODATA is shown in Figure 39 and Table 310.
To configure a GPIO pin as an input, clear the direction bit that corresponds to the pin in IODIR to 0. To read
the logic state of the input pin, read the corresponding bit in IODATA.
To configure a GPIO pin as an output, set the direction bit that corresponds to the pin in IODIR to 1. To control
the logic state of the output pin, write to the corresponding bit in IODATA.
15
8
7
6
5
4
3
2
1
0
Reserved
IO7DIR
IO6DIR
IO5DIR
(BGA)
IO4DIR
IO3DIR
IO2DIR
IO1DIR
IO0DIR
R00000000
R/W0
R/W0
R/W0
R/W0
R/W0
R/W0
R/W0
R/W0
LEGEND:
R = Read, W = Write,
n
= value after reset
Figure 38. I/O Direction Register (IODIR) Bit Layout
Table 39. I/O Direction Register (IODIR) Bit Functions
BIT
NO.
BIT
NAME
RESET
VALUE
FUNCTION
158
Reserved
0
These bits are reserved and are unaffected by writes.
70
IOxDIR
0
IOx Direction Control Bit.
Controls whether IOx operates as an input or an output.
IOxDIR = 0
IOx is configured as an input.
IOxDIR = 1
IOx is configured as an output.
The GPIO5 pin is available on the BGA package only.
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