From e8b9383ba92578a14dab49fd64bdbeb40900c152 Mon Sep 17 00:00:00 2001 From: MaPePeR Date: Sun, 22 Oct 2017 11:27:18 +0200 Subject: [PATCH] Information about clock divider in GPCLK-Overlay Adds link to BCM2835 ARM Peripherals Document and informs about the error in that document regarding GPCLK. (That info would have saved me a lot of time a few days ago, so i thought it would be great to put it there) Related: raspberrypi/documentation#747 --- src/en/overlay/iface-gpclk.md | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/src/en/overlay/iface-gpclk.md b/src/en/overlay/iface-gpclk.md index 52eb5e6..fef0b11 100644 --- a/src/en/overlay/iface-gpclk.md +++ b/src/en/overlay/iface-gpclk.md @@ -28,4 +28,5 @@ The following clock sources are available: 6 500 MHz PLLD 7 216 MHz HDMI auxiliary 8-15 0 Hz Ground -``` \ No newline at end of file +``` +Other frequencies can be achieved by setting a clock-divider in the form of `SOURCE/(DIV_I + DIV_F/4096)`. Note, that the [BCM2835 ARM Peripherals](https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2835/BCM2835-ARM-Peripherals.pdf) document contains an error and states that the denominator of the divider is 1024 instead of 4096.