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 1277
UG585 (v1.11) September 27, 2016
Appendix B: Register Details
dbus_width 22:21 rw 0x0 Data bus width. Only valid bus widths may be
written if the system is configured to a maximum
width less than 128-bits. Zynq defines
gem_dma_bus_width_def as 2'b00.
00: 32 bit AMBA AHB data bus width
01: 64 bit AMBA AHB data bus width
10: 128 bit AMBA AHB data bus width
11: 128 bit AMBA AHB data bus width
mdc_clk_div
(MDCCLKDIV)
20:18 rw 0x2 MDC clock division - set according to cpu_1xclk
speed.
These three bits determine the number cpu_1xclk
will be divided by to generate MDC. For
conformance with the 802.3 specification, MDC
must not exceed 2.5 MHz (MDC is only active
during MDIO read and write operations).
000: divide cpu_1xclk by 8 (cpu_1xclk up to 20
MHz)
001: divide cpu_1xclk by 16 (cpu_1xclk up to 40
MHz)
010: divide cpu_1xclk by 32 (cpu_1xclk up to 80
MHz)
011: divide cpu_1xclk by 48 (cpu_1xclk up to
120MHz)
100: divide cpu_1xclk by 64 (cpu_1xclk up to 160
MHz)
101: divide cpu_1xclk by 96 (cpu_1xclk up to 240
MHz)
110: divide cpu_1xclk by 128 (cpu_1xclk up to 320
MHz)
111: divide cpu_1xclk by 224 (cpu_1xclk up to 540
MHz)
fcs_remove
(FCSREM)
17 rw 0x0 FCS remove - setting this bit will cause received
frames to be written to memory without their
frame check sequence (last 4 bytes). The frame
length indicated will be reduced by four bytes in
this mode.
len_err_frame_disc
(LENGTHERRDSCRD)
16 rw 0x0 Length field error frame discard - setting this bit
causes frames with a measured length shorter
than the extracted length field (as indicated by
bytes 13 and 14 in a non-VLAN tagged frame) to
be discarded. This only applies to frames with a
length field less than 0x0600.
rx_buf_offset
(RXOFFS)
15:14 rw 0x0 Receive buffer offset - indicates the number of
bytes by which the received data is offset from the
start of the receive buffer.
Field Name Bits Type Reset Value Description