PCF(4)

💖 PCF(4) — Philips I2C bus controller 💖

okay bestie, so this is the pcf page from the Kernel Interfaces Manual and honestly? she's a little vintage but she's serving. 🎀

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✨ NAME ✨

pcf — Philips I2C bus controller

like. that's her. that's the whole vibe. 👑

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🌸 SYNOPSIS 🌸

device pcf

and then, in /boot/device.hints:

hint.pcf.0.at="isa"
hint.pcf.0.port="0x320"
hint.pcf.0.irq="5"

and if you want one or more iicbus busses (yes, plural, we're doing multiple, main character energy 🌈):

device iicbus

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💅 DESCRIPTION 💅

The pcf driver is here to support the Philips PCF8584 I2C controller for the iicbus(4) system. that's literally her job and she ate. 💅

The PCF8584 is an integrated circuit, designed in CMOS technology, and she's the moment that sits between most standard parallel-bus microcontrollers/microprocessors and the serial I2C-bus. it's giving bridge. it's giving translator. it's giving glow up between two worlds ✨🦋

The PCF8584 provides both master and slave functions — yes, she can do both, we love a versatile queen 👑. Communication with the I2C-bus happens on a byte-wise basis, using interrupt or polled handshake (pick your fighter, both are valid 💖).

She controls all the I2C-bus specific sequences, protocol, arbitration and timing — like, all of it, no cap. and she lets parallel-bus systems communicate bidirectionally with the I2C-bus, so the gossip flows both ways, as it should. 💌

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🌟 SEE ALSO 🌟

• iicbus(4)

go read her too, she's part of the friend group 🫶

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🎀 HISTORY 🎀

The pcf manual page first appeared in FreeBSD 3.0. an icon. a legend. a pioneer. 💜

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💜 AUTHORS 💜

This manual page was written by Nicolas Souchu. thank you for your service, king 🫡🌸

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and that's the whole page, bestie — go forth and talk to your I2C bus, she's waiting 💖✨

— xoxo, your girl, signing off from the Debian build of this page, dated August 6, 1998 🎀🦋 (yes we're old, no we're not expired, periodt 💅)