Cypress CY7C68015A, CY7C68013 manual Sequence Diagram of a Single and Burst Asynchronous Write

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CY7C68013A, CY7C68014A

CY7C68015A, CY7C68016A

10.17.4 Sequence Diagram of a Single and Burst Asynchronous Write

Figure 34. Slave FIFO Asynchronous Write Sequence and Timing Diagram[20]

 

tSFA

 

tFAH

tSFA

 

 

 

 

 

 

 

 

 

 

tFAH

FIFOADR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

t=0

tWRpwl

tWRpwh

T=0

tWRpwl

 

tWRpwh

 

tWRpwl

tWRpwh

tWRpwl

 

tWRpwh

 

 

 

 

 

 

 

 

 

 

 

 

SLWR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

t =1

t=3

T=1

T=3

 

T=4

T=6

T=7

T=9

 

 

SLCS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tXFLG

 

 

 

 

 

 

 

 

 

 

 

tXFLG

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FLAGS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tSFD

tFDH

 

t

t

FDH

 

t

t

t

 

t

FDH

 

 

 

 

 

 

SFD

 

 

SFD

FDH

SFD

 

 

DATA

 

 

N

 

 

N+1

 

 

N+2

 

 

N+3

 

 

 

t=2

 

 

T=2

 

 

 

T=5

 

T=8

 

 

tPEpwl

tPEpwh

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PKTEND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 34 shows the timing relationship of the SLAVE FIFO write in an asynchronous mode. The diagram shows a single write followed by a burst write of 3 bytes and committing the 4 byte short packet using PKTEND.

■At t = 0 the FIFO address is applied, insuring that it meets the setup time of tSFA. If SLCS is used, it must also be asserted (SLCS may be tied low in some applications).

■At t = 1 SLWR is asserted. SLWR must meet the minimum active pulse of tWRpwl and minimum de-active pulse width of tWRpwh. If the SLCS is used, it must be asserted with SLWR or before SLWR is asserted.

■At t = 2, data must be present on the bus tSFD before the deasserting edge of SLWR.

■At t = 3, deasserting SLWR causes the data to be written from the data bus to the FIFO and then increments the FIFO pointer.

The FIFO flag is also updated after tXFLG from the deasserting edge of SLWR.

The same sequence of events are shown for a burst write and is indicated by the timing marks of T = 0 through 5.

Note In the burst write mode, after SLWR is deasserted, the data is written to the FIFO and then the FIFO pointer is incremented to the next byte in the FIFO. The FIFO pointer is post incre- mented.

In Figure 34 after the four bytes are written to the FIFO and SLWR is deasserted, the short 4 byte packet can be committed to the host using the PKTEND. The external device should be designed to not assert SLWR and the PKTEND signal at the same time. It should be designed to assert the PKTEND after SLWR is deasserted and met the minimum deasserted pulse width. The FIFOADDR lines have to held constant during the PKTEND assertion.

Document #: 38-08032 Rev. *L

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Contents Cypress Semiconductor Corporation 198 Champion Court Features CY7C68013A/14A/15A/16AFeatures CY7C68015A/16A only Logic Block DiagramFeatures CY7C68013A/14A only Functional Overview ApplicationsBus-powered Applications USB Boot MethodsReNumeration Interrupt SystemFIFO/GPIF Interrupt INT4 INT2 USB InterruptsPriority INT2VEC Value Source Reset Pin Reset and WakeupProgram/Data RAM Reset Timing Values ConditionInternal Code Memory, EA = Inside FX2LP Outside FX2LPExternal Code Memory, EA = Register AddressesEndpoint Configurations High -speed Mode Setup Data BufferEndpoint RAM Size × 64 bytes Endpoints 0 × 512 bytesMaster/Slave Control Signals 12.5 Default Full-Speed Alternate SettingsExternal Fifo Interface ArchitectureECC Generation7 Autopointer AccessGpif USB Uploads and DownloadsCompatible with Previous Generation EZ-USB FX2 18 I2C ControllerPart Number Conversion Table Package Description20 CY7C68013A/14A and CY7C68015A/16A Differences Pin AssignmentsIfclk PE0 PE1128 Pin Tqfp CY7C68013A/CY7C68014ACY7C68013A/CY7C68014A CY7C68013A/CY7C68014A 56-pin Ssop Pin Assignment CY7C68013A/CY7C68014A 56-pin SsopCY7C68015A/CY7C68016A Pin QFN CY7C68013A 56-pin Vfbga Pin Assignment Top View CY7C68013A/15A Pin Descriptions FX2LP Pin Descriptions 128 100 56 VF Name Type DefaultPort 56 VF Name Type Default DescriptionFX2LP Pin Descriptions WU2 IFCONFIG1..0FIFOADR0 FIFOADR1PORTCCFG.0 GPIFADR0GPIFADR1 PORTCCFG.1T0OUT Port ET1OUT T2OUTINT6 RXD1OUTT2EX GPIFADR8Flagc FlagbCTL3 CTL4Ground FX2LP Register Summary Register SummaryRegister can only be reset, it cannot be set Epie EP0CS E6CB Flowstb DPL0 = both read/write bit Absolute Maximum Ratings Thermal CharacteristicsOperating Conditions ΘJc + θCaUSB Transceiver DC CharacteristicsAC Electrical Characteristics Program Memory Read Parameters Description Min Typ Max Unit Program Memory ReadClkout Data Memory Read Parameters Description Min Typ Max Unit Data Memory ReadCLKOUT17 Data Memory Write Parameters Description Min Max Unit Data Memory WriteStretch = WR# Strobe Function when Portc is Accessed by Portc Strobe Feature TimingsGpif Synchronous Signals Timing Diagram20 Gpif Synchronous SignalsSlave Fifo Synchronous Read Slave Fifo Synchronous Read Timing Diagram20Slave Fifo Asynchronous Read Slave Fifo Asynchronous Read Timing Diagram20Slave Fifo Synchronous Write Slave Fifo Synchronous Write Timing Diagram20Slave Fifo Synchronous Packet End Strobe Slave Fifo Asynchronous WriteSlave Fifo Asynchronous Packet End Strobe Slave Fifo Synchronous Write Sequence and Timing DiagramSlave Fifo Address to Flags/Data Slave Fifo Output EnableSlave Fifo Synchronous Address FIFOADR10 to SLRD/SLWR/PKTEND Setup TimeSlave Fifo Asynchronous Address RD/WR/PKTEND to FIFOADR10 Hold TimeSingle and Burst Synchronous Read Example Sequence Diagram10.17.2 Single and Burst Synchronous Write Slave Fifo Asynchronous Read Sequence and Timing Diagram20 Sequence Diagram of a Single and Burst Asynchronous ReadSlave Fifo Asynchronous Write Sequence and Timing Diagram20 Sequence Diagram of a Single and Burst Asynchronous WriteIdeal for non-battery powered applications Ideal for battery powered applicationsOrdering Information Development Tool KitLead Shrunk Small Outline Package O56 Package DiagramsLead QFN 8 x 8 mm LF56A Pin Thin Plastic Quad Flatpack 14 x 20 x 1.4 mm A100RA Lead Thin Plastic Quad Flatpack 14 x 20 x 1.4 mm A128 Vfbga 5 x 5 x 1.0 mm 0.50 Pitch, 0.30 Ball BZ56 PCB Layout RecommendationsCross-section of the Area Underneath the QFN Package Quad Flat Package No Leads QFN Package Design NotesIssue Orig. Description of Change Date Pyrs Cmcc

CY7C68016A, CY7C68014A, CY7C68015A, CY7C68013 specifications

The Cypress CY7C68013, CY7C68015A, CY7C68014A, and CY7C68016A are part of Cypress Semiconductor's EZ-USB family of microcontrollers, known for their high performance and flexibility in USB applications. These devices are primarily used for USB interfacing and have gained popularity in various industries due to their robust features and capabilities.

One of the main features of the CY7C68013 is its Dual FIFO architecture, allowing for efficient data transfer between USB and the system memory. This feature optimizes throughput and reduces CPU overhead, making it an excellent choice for applications that require high-speed data exchange, such as video streaming, data acquisition, and industrial automation. The device is equipped with a USB 2.0 interface which supports full-speed operation at 12 Mbps, ensuring compatibility with a wide range of USB devices.

The CY7C68015A, a similar variant, offers additional memory options, providing users with the flexibility to select the necessary capacity for their specific applications. This part is particularly useful in scenarios that demand more users or higher data storage, making it ideal for complex USB peripherals like printers and multifunction devices. Moreover, it includes a unique capability of upgradeable firmware, ensuring that the device remains relevant and functional as technology evolves.

In contrast, the CY7C68014A stands out with its support for isochronous data transfers, making it suitable for real-time applications that require timely data delivery. This is particularly important in audio and video applications where delays can impact performance. The device incorporates advanced power management features, allowing it to operate efficiently both in low and high-power modes.

Lastly, the CY7C68016A integrates enhanced security features, positioning it as an ideal choice for applications that require data integrity and protection against unauthorized access. It supports various encryption standards and provides secure boot capabilities, making it suitable for secure environments such as financial transactions and sensitive data processing.

In summary, the CY7C68013, CY7C68015A, CY7C68014A, and CY7C68016A microcontrollers offer a versatile suite of features that cater to a wide array of USB applications. Their design emphasizes performance, flexibility, and security, making them essential components in today's rapidly evolving technology landscape. Whether in consumer electronics, industrial automation, or specialized applications, these devices provide the reliability and efficiency that engineers and developers require.
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