User manual
Table Of Contents
- Zynq-7000 All Programmable SoC
- Table of Contents
- Ch. 1: Introduction
- Ch. 2: Signals, Interfaces, and Pins
- Ch. 3: Application Processing Unit
- Ch. 4: System Addresses
- Ch. 5: Interconnect
- Ch. 6: Boot and Configuration
- Ch. 7: Interrupts
- Ch. 8: Timers
- Ch. 9: DMA Controller
- Introduction
- Functional Description
- DMA Transfers on the AXI Interconnect
- AXI Transaction Considerations
- DMA Manager
- Multi-channel Data FIFO (MFIFO)
- Memory-to-Memory Transfers
- PL Peripheral AXI Transactions
- PL Peripheral Request Interface
- PL Peripheral - Length Managed by PL Peripheral
- PL Peripheral - Length Managed by DMAC
- Events and Interrupts
- Aborts
- Security
- IP Configuration Options
- Programming Guide for DMA Controller
- Programming Guide for DMA Engine
- Programming Restrictions
- System Functions
- I/O Interface
- Ch. 10: DDR Memory Controller
- Introduction
- AXI Memory Port Interface (DDRI)
- DDR Core and Transaction Scheduler (DDRC)
- DDRC Arbitration
- Controller PHY (DDRP)
- Initialization and Calibration
- DDR Clock Initialization
- DDR IOB Impedance Calibration
- DDR IOB Configuration
- DDR Controller Register Programming
- DRAM Reset and Initialization
- DRAM Input Impedance (ODT) Calibration
- DRAM Output Impedance (RON) Calibration
- DRAM Training
- Write Data Eye Adjustment
- Alternatives to Automatic DRAM Training
- DRAM Write Latency Restriction
- Register Overview
- Error Correction Code (ECC)
- Programming Model
- Ch. 11: Static Memory Controller
- Ch. 12: Quad-SPI Flash Controller
- Ch. 13: SD/SDIO Controller
- Ch. 14: General Purpose I/O (GPIO)
- Ch. 15: USB Host, Device, and OTG Controller
- Introduction
- Functional Description
- Programming Overview and Reference
- Device Mode Control
- Device Endpoint Data Structures
- Device Endpoint Packet Operational Model
- Device Endpoint Descriptor Reference
- Programming Guide for Device Controller
- Programming Guide for Device Endpoint Data Structures
- Host Mode Data Structures
- EHCI Implementation
- Host Data Structures Reference
- Programming Guide for Host Controller
- OTG Description and Reference
- System Functions
- I/O Interfaces
- Ch. 16: Gigabit Ethernet Controller
- Ch. 17: SPI Controller
- Ch. 18: CAN Controller
- Ch. 19: UART Controller
- Ch. 20: I2C Controller
- Ch. 21: Programmable Logic Description
- Ch. 22: Programmable Logic Design Guide
- Ch. 23: Programmable Logic Test and Debug
- Ch. 24: Power Management
- Ch. 25: Clocks
- Ch. 26: Reset System
- Ch. 27: JTAG and DAP Subsystem
- Ch. 28: System Test and Debug
- Ch. 29: On-Chip Memory (OCM)
- Ch. 30: XADC Interface
- Ch. 31: PCI Express
- Ch. 32: Device Secure Boot
- Appx. A: Additional Resources
- Appx. B: Register Details
- Overview
- Acronyms
- Module Summary
- AXI_HP Interface (AFI) (axi_hp)
- CAN Controller (can)
- DDR Memory Controller (ddrc)
- CoreSight Cross Trigger Interface (cti)
- Performance Monitor Unit (cortexa9_pmu)
- CoreSight Program Trace Macrocell (ptm)
- Debug Access Port (dap)
- CoreSight Embedded Trace Buffer (etb)
- PL Fabric Trace Monitor (ftm)
- CoreSight Trace Funnel (funnel)
- CoreSight Intstrumentation Trace Macrocell (itm)
- CoreSight Trace Packet Output (tpiu)
- Device Configuration Interface (devcfg)
- DMA Controller (dmac)
- Gigabit Ethernet Controller (GEM)
- General Purpose I/O (gpio)
- Interconnect QoS (qos301)
- NIC301 Address Region Control (nic301_addr_region_ctrl_registers)
- I2C Controller (IIC)
- L2 Cache (L2Cpl310)
- Application Processing Unit (mpcore)
- On-Chip Memory (ocm)
- Quad-SPI Flash Controller (qspi)
- SD Controller (sdio)
- System Level Control Registers (slcr)
- Static Memory Controller (pl353)
- SPI Controller (SPI)
- System Watchdog Timer (swdt)
- Triple Timer Counter (ttc)
- UART Controller (UART)
- USB Controller (usb)
Zynq-7000 AP SoC Technical Reference Manual www.xilinx.com 510
UG585 (v1.11) September 27, 2016
Chapter 16: Gigabit Ethernet Controller
Gigabit Ethernet Controller using EMIO
The EMIO interface allows for derivation of other physical MII interfaces using appropriate
shim-logic in the PL. The Controller provides a GMII interface through the EMIO.
Example: Configure Controllers for EMIO
1. Unlock the SLCR module. Write a value of 0xDF0D to the slcr.SLCR_UNLOCK register.
2. Enable the level shifters for PS user inputs to FPGA in FPGA tile 1. Write a value of 0b11 to
bit slcr.LVL_SHFTR_EN[USER_INP_ICT_EN_1].
3. Enable the level shifter for PS user inputs to FPGA in FPGA tile 0. Write 0b11 to bit
slcr.LVL_SHFTR_EN[USER_INP_ICT_EN_0].
4. Write a value of 0 to the slcr.FPGA_RST_CTRL register.
5. Perform a software reset. Write 0b1 to bits slcr.FPGA_RST_CTRL[FPGA{0-3}_OUT_RST].
6. Write a value of 0 to the slcr.FPGA_RST_CTRL register.
7. Lock the SLCR module. Write a value of 0x767B to the slcr.SLCR_LOCK register.
Configure Clocks
The Gigabit Ethernet Controller clocks are controlled through four registers in the SLCR module.
Example: Configuring Clocks for MIO
1. Unlock the SLCR module. Write a value of 0xDF0D to slcr.SLCR_UNLOCK register.
2. Configure the clock by writing to the slcr.GEM0_CLK_CTRL register.
Example: A value of 0x0050_0801 enables the Controller0 reference clock, first divisor for the
source clock is 8 and second divisor is 5. This gives a default speed of 100 Mb/s if the Ethernet
source clock is IO PLL which has a frequency of 1,000 MHz.
3. Enable Controller 0 receive clock control. Write a value of 0x0000_0001 to the
slcr.GEM0_RCLK_CTRL register.
4. Lock the SLCR module. Write a value of 0x767B to slcr.SLCR_LOCK register.
Similar steps must be followed for Controller 1 by writing to the appropriate registers.
16.3.4 Configure the PHY
The PHY connected to the controller is initialized through the available management interface
(MDIO) using the PHY maintenance register (gem.phy_maint). Writing to this register starts a shift
operation which is signaled as complete when the bit gem.net_status[phy_mgmt_idle] is set.
The MDIO interface clock (MDC) for GigE is generated by dividing down the CPU_1x clock.
Note: MDC is active only during MDIO read or write operations during which the PHY registers are
read or written.