Cypress CY7C68014A, CY7C68013, CY7C68015A, CY7C68016A Slave Fifo Asynchronous Packet End Strobe

Page 47

CY7C68013A, CY7C68014A CY7C68015A, CY7C68016A

There is no specific timing requirement that should be met for asserting PKTEND pin to asserting SLWR. PKTEND can be asserted with the last data value clocked into the FIFOs or there- after. The setup time tSPE and the hold time tPEH must be met.

Although there are no specific timing requirements for the PKTEND assertion, there is a specific corner case condition that needs attention while using the PKTEND to commit a one byte or word packet. There is an additional timing requirement that needs to be met when the FIFO is configured to operate in auto mode and it is required to send two packets back to back: a full packet (full defined as the number of bytes in the FIFO meeting the level set in AUTOINLEN register) committed automatically followed by a short one byte or word packet committed manually using the PKTEND pin. In this scenario, the user must ensure to assert PKTEND at least one clock cycle after the rising edge that

caused the last byte or word to be clocked into the previous auto committed packet. Figure 23 shows this scenario. X is the value the AUTOINLEN register is set to when the IN endpoint is configured to be in auto mode.

Figure 23 shows a scenario where two packets are committed. The first packet gets committed automatically when the number of bytes in the FIFO reaches X (value set in AUTOINLEN register) and the second one byte/word short packet being committed manually using PKTEND.

Note that there is at least one IFCLK cycle timing between the assertion of PKTEND and clocking of the last byte of the previous packet (causing the packet to be committed automatically). Failing to adhere to this timing results in the FX2 failing to send the one byte or word short packet.

Figure 23. Slave FIFO Synchronous Write Sequence and Timing Diagram[20]

 

 

tIFCLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IFCLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tSFA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tFAH

 

FIFOADR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

>= tSWR

 

 

 

 

 

 

 

 

 

 

 

 

>= tWRH

 

 

SLWR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

t

 

tFDH

tSFD

t

t

SFD

tFDH

t

t

FDH

t

t

t

t

 

 

SFD

 

 

FDH

 

 

SFD

 

SFD

FDH

SFD

FDH

 

 

DATA

X-4

 

X-3

 

 

X-2

 

X-1

 

 

X

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

At least one IFCLK cycle

tSPE

tPEH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PKTEND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.12 Slave FIFO Asynchronous Packet End Strobe

Figure 24. Slave FIFO Asynchronous Packet End Strobe Timing Diagram[20]

PKTEND

tPEpwl

tPEpwh

FLAGS

tXFLG

Table 28. Slave FIFO Asynchronous Packet End Strobe Parameters[23]

Parameter

Description

Min

Max

Unit

tPEpwl

PKTEND Pulse Width LOW

50

 

ns

tPWpwh

PKTEND Pulse Width HIGH

50

 

ns

tXFLG

PKTEND to FLAGS Output Propagation Delay

 

115

ns

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 ApplicationsInterrupt System USB Boot MethodsBus-powered Applications ReNumerationFIFO/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 AddressesSize × 64 bytes Endpoints 0 × 512 bytes Setup Data BufferEndpoint Configurations High -speed Mode Endpoint RAMArchitecture 12.5 Default Full-Speed Alternate SettingsMaster/Slave Control Signals External Fifo InterfaceUSB Uploads and Downloads Autopointer AccessECC Generation7 GpifPackage Description 18 I2C ControllerCompatible with Previous Generation EZ-USB FX2 Part Number Conversion TablePE1 Pin Assignments20 CY7C68013A/14A and CY7C68015A/16A Differences Ifclk PE0128 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 FIFOADR1 IFCONFIG1..0WU2 FIFOADR0PORTCCFG.1 GPIFADR0PORTCCFG.0 GPIFADR1T2OUT Port ET0OUT T1OUTGPIFADR8 RXD1OUTINT6 T2EXCTL4 FlagbFlagc CTL3Ground FX2LP Register Summary Register SummaryRegister can only be reset, it cannot be set Epie EP0CS E6CB Flowstb DPL0 = both read/write bit ΘJc + θCa Thermal CharacteristicsAbsolute Maximum Ratings Operating ConditionsUSB 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 EnableRD/WR/PKTEND to FIFOADR10 Hold Time FIFOADR10 to SLRD/SLWR/PKTEND Setup TimeSlave Fifo Synchronous Address Slave Fifo Asynchronous AddressSingle 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 WriteDevelopment Tool Kit Ideal for battery powered applicationsIdeal for non-battery powered applications Ordering InformationLead 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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