Cypress CY7C68013A 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

CY7C68013A specifications

The Cypress CY7C68013A is a high-performance USB microcontroller that belongs to Cypress's FX2LP family, specifically designed for USB applications. This microcontroller is well-regarded for its versatility, making it a popular choice for developers engaged in USB-enabled projects.

One of the main features of the CY7C68013A is its ability to support USB 2.0, with both high-speed (480 Mbps) and full-speed (12 Mbps) operation. This capability allows developers to take full advantage of the USB interface for data transfer, making it suitable for applications that require fast and efficient data communication. The device integrates a USB controller along with an 8051-compatible microcontroller, providing a seamless interface for USB transactions while also allowing for custom processing tasks.

The CY7C68013A offers 32 KB of internal RAM, which is a valuable resource for data buffering and temporary storage during data transfer operations. Additionally, it includes a programmable 8-bit I/O interface, which can be tailored to various application needs, facilitating control over peripheral devices. The microcontroller also features a 16-bit address bus and a 16-bit data bus, enhancing its ability to interface with external memory and components.

In terms of development, moving from concept to production becomes easier due to the availability of development kits and software support. The CY7C68013A is compatible with Cypress's EZ-USB development environment, which includes APIs and libraries that simplify the coding process. This software support empowers developers to create sophisticated USB-related applications without needing extensive background knowledge in USB protocol intricacies.

Regarding power efficiency, the CY7C68013A operates at low power consumption levels, making it suitable for battery-operated devices. It supports various low-power modes, which further enhances its appeal for portable applications.

Overall, the Cypress CY7C68013A stands out for its robust features, flexibility, and ease of use, making it an ideal choice for engineers working on USB-centric designs. Its combination of high-speed USB functionality, ample internal resources, and strong software support positions it as a go-to microcontroller for a wide variety of applications, ranging from consumer electronics to industrial systems.
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