Cypress CY7C67300 manual General Purpose IO Interface Gpio, Uart Interface, I2C Eeprom Interface

Page 7

CY7C67300

Figure 4 illustrates the interface for connecting an 8-bit ROM or 8-bit RAM to the EZ-Host external memory interface. In 8-bit mode, up to 512K bytes of external ROM or RAM are supported.

Figure 4. Interfacing up to 512k × 8 for External Code/Data

Up to 512k x 8 External Code/Data (Page Mode)

EZ-Host

 

External Memory Array

CY7C67300

 

Up to 512k x8

A[18:0] A[18:0]

D[7:0] D[7:0]

nXMEMSEL CE

nWR WE

nRD OE

General Purpose IO Interface (GPIO)

EZ-Host has up to 32 GPIO signals available. Several other optional interfaces use GPIO pins as well and may reduce the overall number of available GPIOs.

GPIO Description

All Inputs are sampled asynchronously with state changes occurring at a rate of up to two 48 MHz clock cycles. GPIO pins are latched directly into registers, a single flip-flop.

Unused Pin Descriptions

Ensure to tristate unused USB pins with the D+ line pulled high through the internal pull up resistor and the D– line pulled low through the internal pull down resistor.

Configure unused GPIO pins as outputs so they are driven low.

UART Interface

EZ-Host has a built in UART interface. The UART interface supports data rates from 900 to 115.2K baud. It can be used as a development port or for other interface requirements. The UART interface is exposed through GPIO pins.

UART Features

■Supports baud rates of 900 to 115.2K

■8-N-1

UART Pins.

Table 7. UART Interface Pins

Pin Name

Pin Number

TX

42

 

 

RX

43

 

 

I2C EEPROM Interface

EZ-Host provides a master-only I2C interface for external serial EEPROMs. The serial EEPROM can be used to store application specific code and data. Use the I2C interface for loading code out of EEPROM, it is not a general I2C interface. The I2C EEPROM interface is a BIOS implementation and is exposed through GPIO pins. Refer to the BIOS documentation for additional details on this interface.

I2C EEPROM Features

■Supports EEPROMs up to 64 KB (512K bit)

■Auto-detection of EEPROM size

I2C EEPROM Pins

Table 8. I2C EEPROM Interface Pins

Pin Name

Pin Number

GPIO Number

 

SMALL EEPROM

 

SCK

39

GPIO31

 

 

 

SDA

40

GPIO30

 

 

 

 

LARGE EEPROM

 

SCK

40

GPIO30

 

 

 

SDA

39

GPIO31

 

 

 

Serial Peripheral Interface

EZ-Host provides a SPI interface for added connectivity. EZ-Host may be configured as either an SPI master or SPI slave. The SPI interface can be exposed through GPIO pins or the External Memory port.

SPI Features

■Master or slave mode operation

■DMA block transfer and PIO byte transfer modes

■Full duplex or half duplex data communication

■8-byte receive FIFO and 8-byte transmit FIFO

■Selectable master SPI clock rates from 250 kHz to 12 MHz

■Selectable master SPI clock phase and polarity

■Slave SPI signaling synchronization and filtering

■Slave SPI clock rates up to 2 MHz

■Maskable interrupts for block and byte transfer modes

■Individual bit transfer for non-byte aligned serial communi- cation in PIO mode

■Programmable delay timing for the active/inactive master SPI clock

■Auto or manual control for master mode slave select signal

■Complete access to internal memory

Document #: 38-08015 Rev. *J

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Contents CY7C67300 Block Diagram EZ-Host FeaturesTypical Applications Functional Overview IntroductionInterface Descriptions USB Interface Interface Options for External Memory Bus Pins MEM PinsOTG Interface Pins Pin Name Pin Number USB Interface Pins Pin Name Pin NumberOTG Interface External Memory Interface Up to 256k x 16 External Code/Data Page Mode External Memory Interface PinsExternal Memory Interface Pins Pin Name Pin Number External Memory Interface Block DiagramsSerial Peripheral Interface General Purpose IO Interface GpioUart Interface I2C Eeprom InterfaceProgrammable Pulse/PWM Interface High-Speed Serial InterfaceIDE Interface HPI Interface Pins 3 Pin Name Pin NumberHPI Interface Pins 3 Host Port InterfaceActual IDE Throughput ModeIDE Interface Pins Pin Name Pin Number Charge Pump Interface Pins Pin Name Pin NumberBooster Interface Booster PinsCrystal Pins Crystal Pins Pin Name Pin NumberOperational Modes Boot Configuration InterfaceBoot Configuration Interface Boot ModePower Saving Mode Description Power Savings and Reset DescriptionSleep Memory Map Document # 38-08015 Rev. *JPage 15 Bank Selected 0xC018 0xC01AProcessor Control Registers RegistersRevision Register Bank RegisterBank Register Example Hex Value Binary Value ReservedCPU Speed Definition Processor Speed Host/Device 1B Wake Enable Bit Power Control RegisterHost/Device 2B Wake Enable Bit Host/Device 2A Wake Enable BitSPI Interrupt Enable Bit Sleep Enable BitInterrupt Enable Register Halt Enable Bit OTG Interrupt Enable BitUart Interrupt Enable Bit HSS Interrupt Enable BitMailbox Interrupt Enable Bit Out Mailbox Interrupt Enable BitPort 1B Diagnostic Enable Bit USB Diagnostic RegisterPort 2B Diagnostic Enable Bit Port 2A Diagnostic Enable BitExternal Memory Registers Extended Page n Map Register Upper Address Enable Register 0xC038 R/WUpper Address Enable Bit Extended Page n Map Register R/WTimer Registers WDT Enable Bit Watchdog Timer RegisterTimeout Flag Bit Lock Enable BitPort B D+ Status Bit Timer n RegisterGeneral USB Registers USB n Control RegisterEnable Mode Select BitPort B Resistors Enable Bit Port a Resistors Enable BitUSB Host Only Register Register Name Address Host 1/Host Port a SOF/EOP Enable Bit ReservedPreamble Enable Bit USB Host Only RegistersSequence Select Bit Sync Enable BitHost n Address Register ISO Enable Bit Arm Enable BitNAK Flag Bit Port Select BitUnderflow Flag Bit Stall Flag BitHost n PID Register Error Flag BitSequence Status Bit Host n PID Register WHost n Count Result Register Endpoint Select Bits PID Select DefinitionPID Select Host n Count Result Register RHost n Device Address Register Host n Interrupt Enable RegisterVbus Interrupt Enable Bit ID Interrupt Enable BitPort B Connect Change Interrupt Enable Bit SOF/EOP Interrupt Enable BitPort B Wake Interrupt Enable Bit Port a Wake Interrupt Enable BitPort B Connect Change Interrupt Flag Bit SOF/EOP Interrupt Flag BitPort B Wake Interrupt Flag Bit Port a Wake Interrupt Flag BitHost 1 Frame Register 0xC096 Host 2 Frame Register 0xC0B6 Host n SOF/EOP Counter Register RHost n SOF/EOP Counter Register Host n Frame Register RDevice n Endpoint n Control Register IN/OUT Ignore Enable BitUSB Device Only Registers Device n Endpoint n Control Register R/WDirection Select Bit Stall Enable BitNAK Interrupt Enable Bit Enable BitDevice n Endpoint n Count Register Device n Endpoint n Count Register R/WException Flag Bit Device n Endpoint n Status Register R/WDevice n Endpoint n Status Register OUT Exception Flag BitDevice n Endpoint n Count Result Register Setup Flag BitSequence Flag Bit Device n Endpoint n Count Result Register R/WDevice n Port Select Register Device n Interrupt Enable Register R/WDevice n Interrupt Enable Register Port Select Bit Device n Port Select Register R/WEP6 Interrupt Enable Bit SOF/EOP Timeout Interrupt Enable BitReset Interrupt Enable Bit EP7 Interrupt Enable BitDevice n Status Register R/W EP0 Interrupt Enable BitDevice n Address Register W Device n Address RegisterEP5 Interrupt Flag Bit Reset Interrupt Flag BitEP7 Interrupt Flag Bit EP6 Interrupt Flag BitEP1 Interrupt Flag Bit SOF/EOP Timeout Flag BitSOF/EOP Timeout Interrupt Counter Bits EP2 Interrupt Flag BitOTG Control Register Reserved Vbus Pull-up Enable BitOTG Control Registers Device n SOF/EOP Count RegisterGpio Registers HSS Enable Bit Write Protect Enable BitSAS Enable Bit Mode Select Definition Gpio Configuration 108Gpio n Input Data Register Interrupt 0 Enable BitInterrupt 0 Polarity Select Bit Reserved Gpio n Output Data RegisterIDE Registers IDE Start Address Register 0xC04A R/W Mode Select DefinitionIDE Start Address Register IDE Control Register IDE Interrupt Enable BitIDE Enable Bit IDE Stop Address RegisterIDE PIO Port Registers 0xC050 0xC06F R/W HSS RegistersHSS Registers Register Name Address HSS Control Register Xoff Enable BitCTS Enable Bit Receive Interrupt Enable BitHSS Baud Rate Register Packet Mode Select BitTransmit Ready Bit Receive Overflow Flag BitHSS Data Register 0xC076 R/W HSS Transmit Gap Register 0xC074 R/WHSS Transmit Gap Register Transmit Gap Select BitsHSS Receive Counter Register HSS Receive Counter Register 0xC07A R/WHSS Transmit Counter Register HSS Transmit Address Register 0xC07C R/WHSS Transmit Address Register HSS Transmit Counter Register 0xC07E R/WInterrupt Routing Register Vbus to HPI Enable BitHPI Registers HPI Breakpoint Register HPI Registers Register Name AddressSOF/EOP1 to HPI Enable Bit ID to HPI Enable BitSOF/EOP2 to HPI Enable Bit SOF/EOP2 to CPU Enable BitHPI Mailbox Register 0xC0C6 R/W SIEXmsg Register WSIE1msg Register SIE2msg Register SIEXmsg RegisterID Flag Bit Reset2 Flag BitHPI Status Port Vbus Flag BitMailbox Out Flag Bit Reset1 Flag BitSPI Registers Done1 Flag BitMaster Enable Bit 3Wire Enable BitPhase Select Bit Master Active Enable BitSCK Strobe Bit Byte Mode BitRead Enable Bit SPI Control RegisterFifo Error Flag Bit SPI Interrupt Enable RegisterTransmit Interrupt Enable Bit Transfer Interrupt Enable BitTransfer Interrupt Flag Bit Receive Interrupt Flag BitTransmit Interrupt Flag Bit SPI Interrupt Clear RegisterSPI CRC Value Register Receive CRC Bit CRC Mode Definition CRCMode CRC Polynomial 1514CRC Enable Bit CRC Clear BitSPI Transmit Address Register SPI Data Register 0xC0D6 R/WSPI Data Register SPI Transmit Address Register 0xC0D8 R/WSPI Receive Address Register SPI Transmit Count RegisterSPI Receive Count Register Uart Registers Uart Data Register 0xC0E4 R/W Uart Status Register 0xC0E2 RUart Status Register Receive buffer full Receive buffer emptyPWM Control Register PWM Enable BitPWM Registers PWM Registers Register Name AddressPWM 0 Enable Bit PWM 3 Enable BitPWM 2 Enable Bit PWM 1 Enable BitPWM n Stop Register PWM n Start Register R/WPWM n Start Register PWM n Stop Register R/WPWM Cycle Count Register PWM Cycle Count Register 0xC0FA R/WPin Descriptions Pin DiagramPin Descriptions Name Type D8/MISO D11/MOSIMosi SPI Mosi SCK SPI SCKGPIO26/CTS/PWM3 GPIO29/OTGIDGPIO28/TX GPIO27/RXTie to Gnd for normal operation Booster Power input 2.7V toCrystal Requirements XTALIN, Xtalout DC CharacteristicsAbsolute Maximum Ratings Operating ConditionsGND USB TransceiverReset Timing AC Timing CharacteristicsClock Timing Sram Read Cycle Parameters Description Min Typical Max Unit Sram Read Cycle15LOW High Sram Write CycleSram Write Cycle Parameters Parameter Description Min Typical Max UnitSCL I2C Eeprom Timing-Serial IOSDA OUT HPI Host Port Interface Write Cycle Timing Read Cycle Time Chip Select Hold Data Access Time, from HPInRD fallingHPI Host Port Interface Read Cycle Timing Read Pulse WidthIDE Timing HSS Byte Mode TransmitHSS Block Mode Transmit HSS Byte and Block Mode ReceiveHardware CTS/RTS Handshake Register SummaryRegister Summary HSS SOF/EOP CRC SOF/EOP2 Pb-Free Package DiagramsOrdering Information Ordering Information Ordering Code Package TypeOrig. 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