CFA633-RDI-KS datasheet(61/88 Pages) CRYSTAIFONTZ

61 / 88 page

Crystalfontz America, Inc.

Data Sheet Release Date 2012/02/21

www.crystalfontz.com

CFA633-RDI-KS LCD Module (Hardware v2.0 / Firmware s2v1)

February 2012

Page 61

returns:

data[0] = index of GPIO read

data[1] = Pin state & changes since last poll

---- -RFS Enable Reporting of this Fan’s Tach Input

|||| ||||-- S = state at the last reading

|||| |||--- F = at least one falling edge has

|||| ||

been detected since the last poll

|||| ||---- R = at least one rising edge has

|||| |

been detected since the last poll

|||| |----- reserved

(This reading is the actual pin state, which may

or may not agree with the pin setting, depending

on drive mode and the load presented by external

circuitry. The pins are polled at approximately

32 Hz asynchronously with respect to this command.

Transients that happen between polls will not be

detected.)

data[2] = Requested Pin level/PWM level

0-100: Output duty cycle percentage

(This value is the requested PWM duty cycle. The

actual pin may or may not be toggling in agreement

with this value, depending on the drive mode and

the load presented by external circuitry)

data[3] = Pin function select and drive mode

---- FDDD

|||| ||||-- DDD = Drive Mode

|||| |

=======================================================

|||| |

000: 1=Fast, Strong Drive Up, 0=Resistive Pull Down

|||| |

001: 1=Fast, Strong Drive Up, 0=Fast, Strong Drive Down

|||| |

010: Hi-Z, use for input

|||| |

011: 1=Resistive Pull Up,

0=Fast, Strong Drive Down

|||| |

100: 1=Slow, Strong Drive Up, 0=Hi-Z

|||| |

101: 1=Slow, Strong Drive Up, 0=Slow, Strong Drive Down

|||| |

110: reserved

|||| |

111: 1=Hi-Z,

0=Slow, Strong Drive Down

|||| |

|||| |----- F = Function

||||

=======================================================

||||

0: Port unused for GPIO. It will take on the default

||||

function such as ATX, DOW or unused. The user is

||||

responsible for setting the drive to the correct

||||

value in order for the default function to work

||||

correctly.

||||

1: Port used for GPIO under user control. The user is

||||

responsible for setting the drive to the correct

||||

value in order for the desired GPIO mode to work

||||

correctly.

||||------- reserved, will return 0

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