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Register 10-60. (GPIOC; 54h) General Purpose I/O Control

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Bit Description Read Write Value after Reset
  GPIO0 or WAITo# Pin Select.Selects the function of GPIO0/WAITo# pin. Value of 1 indicates pin is WAITo#. Value of 0 indicates pin is GPIO0. Yes Yes  
  GPIO0 Direction.Value of 0 indicates Input. Value of 1 indicates output. Always an output if WAITo# function is selected. Yes Yes  
  GPIO0 Data.If programmed as output, writing 1 causes corresponding pin to go high. If programmed as input, reading provides state of corresponding pin. Yes Yes  
  GPIO1 or LLOCKo# Pin Select.Selects the function of GPIO1/LLOCKo# pin. Value of 1 indicates pin is LLOCKo#. Value of 0 indicates pin is GPIO1. Yes Yes  
  GPIO1 Direction.Value of 0 indicates Input. Value of 1 indicates output. Always an output if LLOCK function is selected. Yes Yes  
  GPIO1 Data.If programmed as output, writing 1 causes corresponding pin to go high. If programmed as input, reading provides state of corresponding pin. Yes Yes  
  GPIO2 or CS2# Pin Select.Selects the function of GPIO2/CS2# pin. Value of 1 indicates pin is CS2#. Value of 0 indicates pin is GPIO2. Yes Yes  
  GPIO2 Direction.Value of 0 indicates Input. Value of 1 indicates output. Always an output if CS2# function is selected. Yes Yes  
  GPIO2 Data.If programmed as output, writing 1 causes corresponding pin to go high. If programmed as input, reading provides state of corresponding pin. Yes Yes  
  GPIO3 or CS3# Pin Select.Selects the function of GPIO3/CS3# pin. Value of 1 indicates pin is CS3#. Value of 0 indicates pin is GPIO3. Yes Yes  
  GPIO3 Direction.Value of 0 indicates Input. Value of 1 indicates output. Always an output if CS3# function is selected. Yes Yes  
  GPIO3 Data.If programmed as output, writing 1 causes corresponding pin to go high. If programmed as input, reading provides state of corresponding pin. Yes Yes  
  GPIO4 or LA27 Pin Select.Selects the function of GPIO4/LA27 pin. Value of 1 indicates LA27. Value of 0 indicates GPIO4. Yes Yes  
  GPIO4 Direction.Value of 0 indicates input. Value of 1 indicates output. Always an output if LA27 is selected. Yes Yes  
  GPIO4 Data.If programmed as output, writing 1 causes corresponding pin to go high. If programmed as input, reading provides state of corresponding pin. Yes Yes  
  GPIO5 or LA26 Pin Select.Selects the function of GPIO5/LA26 pin. Value of 1 indicates LA26. Value of 0 indicates GPIO5. Yes Yes  
  GPIO5 Direction.Value of 0 indicates input. Value of 1 indicates output. Always an output if LA26 is selected. Yes Yes  
  GPIO5 Data.If programmed as output, writing 1 causes corresponding pin to go high. If programmed as input, reading provides state of corresponding pin. Yes Yes  
  GPIO6 or LA25 Pin Select.Selects the function of GPIO6/LA25 pin. Value of 1 indicates LA25. Value of 0 indicates GPIO6. Yes Yes  
  GPIO6 Direction.Value of 0 indicates input. Value of 1 indicates output. Always an output if LA25 is selected. Yes Yes  
  GPIO6 Data.If programmed as output, writing 1 causes corresponding pin to go high. If programmed as input, reading provides state of corresponding pin. Yes Yes  
  GPIO7 or LA24 Pin Select.Selects the function of GPIO7/LA24 pin. Value of 1 indicates LA24. Value of 0 indicates GPIO7. Yes Yes  
  GPIO7 Direction.Value of 0 indicates input. Value of 1 indicates output. Always an output if LA24 is selected. Yes Yes  
  GPIO7 Data.If programmed as output, writing 1 causes corresponding pin to go high. If programmed as input, reading provides state of corresponding pin. Yes Yes  


 

Register 10-60. (GPIOC; 54h) General Purpose I/O Control (Continued)

 

Bit Description Read Write Value after Reset
  Reserved. Yes Yes  
  GPIO8 Direction.Value of 0 indicates input. Value of 1 indicates output. Yes Yes  
  GPIO8 Data.If programmed as output, writing 1 causes corresponding pin to go high. If programmed as input, reading provides state of corresponding pin. Yes Yes  
31:27 Reserved. Yes Yes 0h

Note: GPIO pins configured as outputs are driven only when the PCI 9030 owns the Local Bus. When another local master owns the bus (LGNT asserted), GPIO pins configured as outputs are floated. (Refer to PCI 9030 Errata #2 for additional information.)

 

 


Дата добавления: 2015-07-10; просмотров: 135 | Нарушение авторских прав


Читайте в этой же книге: Table 10-2. PCI Configuration Register Address Mapping | Register 10-2. (PCICR; PCI:04h) PCI Command | Register 10-8. (PCIHTR; PCI:0Eh) PCI Header Type | Register 10-13. (PCIBAR3; PCI:1Ch) PCI Base Address 3 for Accesses to Local Address Space 1 | Register 10-20. (CAP_PTR; PCI:34h) New Capability Pointer | Register 10-27. (PMC; PCI:42h) Power Management Capabilities | Register 10-33. (HS_CSR; PCI:4Ah) Hot Swap Control/Status | Register 10-39. (LAS1RR; 04h) Local Address Space 1 Range | Register 10-42. (EROMRR; 10h) Expansion ROM Range | Register 10-56. (CS3BASE; 48h) Chip Select 3 Base Address |
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Register 10-59. (CNTRL; 50h) PCI Target Response, Serial EEPROM, and Initialization Control| Register 10-61. (PMDATASEL; 70h) Hidden 1 Power Management Data Select

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