PCF8563RTC(4) BSD Kernel Interfaces Manual PCF8563RTC(4)NAME
pcf8563rtc -- NXP PCF8563 real-time clock
SYNOPSIS
pcf8563rtc* at iic? addr 0x51
DESCRIPTION
The pcf8563rtc driver provides support for the NXP PCF8563 real-time clock chip.
Access methods to retrieve and set date and time are provided through the TODR interface defined in todr(9).
SEE ALSO iic(4), todr(9)HISTORY
The pcf8563rtc device appeared in NetBSD 6.0.
BUGS
The driver does not support the chip's alarm and timer features.
BSD January 24, 2011 BSD
Check Out this Related Man Page
GPIOIIC(4) BSD Kernel Interfaces Manual GPIOIIC(4)NAME
gpioiic -- GPIO I2C controller
SYNOPSIS
gpioiic* at gpio? offset 0 mask 0x3 flag 0x0
gpioiic* at gpio?
iic* at gpioiic?
DESCRIPTION
The gpioiic driver allows bit-banging an I2C bus as a master using two GPIO pins. By default the first pin is used as a serial data (SDA)
signal and the second as a serial clock (SCL). If the flag locator is set to 0x01, the order of the SDA and SCL signals is reversed. Both
GPIO pins must be able to drive an output and the SDA pin must be also able to read an input.
The pins can be specified in the kernel configuration with the offset and the mask locators. The offset and mask can also be specified when
gpioiic is attached at runtime using the GPIOATTACH ioctl(2) on the gpio(4) device. Each bit in the mask locator defines one pin; the pin
number is calculated as an addition of the bit position and the offset locator. For example, offset 17 and mask 0x5 defines pin numbers 17
and 19.
SEE ALSO gpio(4), iic(4), intro(4)HISTORY
The gpioiic driver first appeared in OpenBSD 3.9 and NetBSD 5.0.
AUTHORS
The gpioiic driver was written by Alexander Yurchenko <grange@openbsd.org> and was ported to NetBSD by Marc Balmer <marc@msys.ch>.
CAVEATS
A gpioiic device can not be detached from the gpio(4) bus at runtime due to the fact that iic(4) busses can not detach once attached.
BSD October 2, 2011 BSD
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