Page History

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• SC to HD-IO Bank Interface
• I²C Backplane interface
• I²C System Control interface
• Power control
• Power status
• FAN Control
• FAN Status
• Power status indication

Firmware Revision and supported PCB Revision

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Product Specification

Port Description

Functional Description

SC to HD-IO Bank Interface

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Functional Description

Power

System Controller provides control and status information for main power rails. By default all power rails are ON, the user can manipulate power using I²C interface, see  Memory map table.

Reset

System controller generates a reset pulse to supervisor chip U69 when front panel button S3 is pressed.

JTAG

JTAG interface from FTDI controller passes through System Controller to FPGA.

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i2c_interface i2c_interface

I²C Interface

To use SC I²C interface corresponding connection should be configured in the FPGA project. There are 2 standard I²C interface controllers, which can be used AXI_IIC or Zynq UltraScale+ MPSoC integrated I²C controller.

AXI_IIC

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Zynq UltraScale+ MPSoC integrated I²C controller

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Project XDC file should contain

set_property PACKAGE_PIN G18 [get_ports {MAX_IO1}]
set_property PACKAGE_PIN G19 [get_ports {MAX_IO2}]
set_property PACKAGE_PIN K18 [get_ports {MAX_IO3}]
set_property PACKAGE_PIN H19 [get_ports {MAX_IO4}]
set_property IOSTANDARD LVCMOS33 [get_ports MAX_IO*]
set_property PULLUP true [get_ports {MAX_IO2}]
set_property PULLUP true [get_ports {MAX_IO4}]

With this configuration, I²C device with address 0x20 should be visible on I²C bus

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This device is an emulation of TCA6416 I²C GPIO Chip. GPIO input and output pins are used to get status and control the system.

LED Control

I²C GPIO registers can be operated with  directly, using Linux i2cset and i2cget commands

root@petalinux:~# # Disable LED4
root@petalinux:~# i2cset -y 0 0x20 2 0xFC
root@petalinux:~# # Get Power status
root@petalinux:~# i2cget -y 0 0x20 0 b
0x3f
root@petalinux:~# # Get FAN RPM/1000
root@petalinux:~# i2cget -y 0 0x20 1 b
0x08

or I²C GPIO device driver can be instantiate in Linux device tree (project-spec/meta-user/recipes-bsp/device-tree/files/system-user.dtsi).

&i2c0 {
	tca6416: tca6416@21 {
		compatible = "ti,tca6416";
		reg = <0x20>;
		gpio-controller;
		#gpio-cells = <2>;
	};
};

LED

The System Controller control D4 LED (front panel green rightmost LED). By default, it act like power status indicator see "Power Indicator" table in "I²C interface" section.

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Appx. A: Change History and Legal Notices

Revision Changes

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RE02 to REV03

• Add I²C GPIO core
• FAN Control/FAN Status
• Power control

RE03 to REV04

• BUGFIX Reset

Document Change History

To get content of older revision  revision got to "Change History"  of this page and select older document revision number.

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Appx. A: Legal Notices