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 456
UG585 (v1.11) September 27, 2016
Chapter 15: USB Host, Device, and OTG Controller
Microframe C-mask
The split completion mask field, siTD.Microframe C-mask, along with the Active and SplitXstate fields in the
Status byte, is used to determine during which microframes the host controller should execute complete-split
transactions. This field is a straight bit position field, so if bit [0] is set then the complete-split transaction should
occur in the first microframe, if bit [1] is set = 1 then it should occur in the second microframe, and so on. When
the criteria for using this field is met, a 0 value has undefined behavior.
The host controller uses the value of the three low-order bits of the FRINDEX register to index into this bit field.
If the FRINDEX register value indexes to a position where the microframe C-Mask field is a 1, then this siTD is a
candidate for transaction execution.
There can be more than one bit in this mask set.
The C-Mask can be set for multiple micro frames, as it is not known in which microframe the transaction will
complete. So the C-Mask can be set for the micro frame after the S-Mask and all subsequent micro fames
thereafter. The C-Mask field should not have a bit set to the same microframe as the S-Mask is set to.
Microframe S-mask
The split start mask field, siTD.Micro S-mask, along with the Active and SplitX-state fields in the Status byte, is
used to determine during which microframes the host controller should execute start-split transactions.
The host controller uses the value of the three low-order bits of the FRINDEX register to index into this bit field.
If the FRINDEX register value indexes to a position where the microframe S-mask field is a 1, then this siTD is a
candidate for transaction execution.
A 0 value in this field, in combination with existing periodic frame list, has undefined results.
This field should have only one bit set to 1 at any given time. Having more than one bit set will result in
undefined results.
15:12 Reserved. Field reserved and should be set to 0.
11:8 Endpoint Number, EndPt. 4-bit field selects the endpoint on the device serving as the data source or
sink.
7 Reserved. Bit reserved and should be set to 0.
6:0 Device Address. Select the specific device serving as the data source or sink.
DWord 2: Microframe Schedule Control
31:16 Reserved. Field reserved and should be set to 0.
15:8 Split Completion Mask, Microframe C-mask.
This field (along with the Active and SplitXstate fields in the Status byte) is used to determine during
which microframes the host controller should execute complete-split transactions. Refer to the text
for details.
7:0 Split Start Mask, Microframe S-mask.
This field (along with the Active and SplitX-state fields in the Status byte) is used to determine during
which microframes the host controller should execute start-split transactions. Refer to the text for
details.
Table 15-31: USB Host siTD DWords 1 and 2:Endpoint State (Cont’d)
Bits Description