/share/man/man4/pcf.4

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  1. .\" Copyright (c) 1998, Nicolas Souchu
    2. 

  2. .\" All rights reserved.
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  8. .\"    notice, this list of conditions and the following disclaimer.
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  10. .\"    notice, this list of conditions and the following disclaimer in the
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  13. .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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  14. .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    15. 

  15. .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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  16. .\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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  25. .\" $FreeBSD$
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  26. .\"
    27. 

  27. .Dd August 6, 1998
    28. 

  28. .Dt PCF 4
    29. 

  29. .Os
    30. 

  30. .Sh NAME
    31. 

  31. .Nm pcf
    32. 

  32. .Nd Philips I2C bus controller
    33. 

  33. .Sh SYNOPSIS
    34. 

  34. .Cd "device pcf"
    35. 

  35. .Pp
    36. 

  36. In
    37. 

  37. .Pa /boot/device.hints :
    38. 

  38. .Cd hint.pcf.0.at="isa"
    39. 

  39. .Cd hint.pcf.0.port="0x320"
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  40. .Cd hint.pcf.0.irq="5"
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  41. .Pp
    42. 

  42. For one or more iicbus busses:
    43. 

  43. .Cd "device iicbus"
    44. 

  44. .Sh DESCRIPTION
    45. 

  45. The
    46. 

  46. .Em pcf
    47. 

  47. driver provides support to the Philips PCF8584 I2C controller for the
    48. 

  48. .Xr iicbus 4
    49. 

  49. system.
    50. 

  50. .Pp
    51. 

  51. The PCF8584 is an integrated circuit designed in CMOS technology which serves
    52. 

  52. as an interface between most standard parallel-bus
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  53. microcontrollers/microprocessors and the serial I2C-bus.
    54. 

  54. The PCF8584
    55. 

  55. provides both master and slave functions.
    56. 

  56. Communication with I2C-bus is
    57. 

  57. carried out on a byte-wise basis using interrupt or polled handshake.
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  58. It
    59. 

  59. controls all the I2C-bus specific sequences, protocol, arbitration and timing.
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  60. The PCF8584 allows parallel-bus systems to communicate bidirectionally with
    61. 

  61. the I2C-bus.
    62. 

  62. .Sh SEE ALSO
    63. 

  63. .Xr iicbus 4
    64. 

  64. .Sh HISTORY
    65. 

  65. The
    66. 

  66. .Nm
    67. 

  67. manual page first appeared in
    68. 

  68. .Fx 3.0 .
    69. 

  69. .Sh AUTHORS
    70. 

  70. This
    71. 

  71. manual page was written by
    72. 

  72. .An Nicolas Souchu .
    73.