block/USB:
  description: Universal serial bus full-speed device interface.
  items:
  - name: EPR
    description: endpoint %s register.
    array:
      len: 8
      stride: 4
    byte_offset: 0
    fieldset: EPR
  - name: CNTR
    description: control register.
    byte_offset: 64
    fieldset: CNTR
  - name: ISTR
    description: interrupt status register.
    byte_offset: 68
    fieldset: ISTR
  - name: FNR
    description: frame number register.
    byte_offset: 72
    access: Read
    fieldset: FNR
  - name: DADDR
    description: device address.
    byte_offset: 76
    fieldset: DADDR
  - name: BTABLE
    description: Buffer table address.
    byte_offset: 80
    fieldset: BTABLE
fieldset/BTABLE:
  description: Buffer table address.
  fields:
  - name: BTABLE
    description: Buffer table.
    bit_offset: 3
    bit_size: 13
fieldset/CNTR:
  description: control register.
  fields:
  - name: FRES
    description: Force USB Reset.
    bit_offset: 0
    bit_size: 1
    enum: FRES
  - name: PDWN
    description: Power down.
    bit_offset: 1
    bit_size: 1
    enum: PDWN
  - name: LPMODE
    description: Low-power mode.
    bit_offset: 2
    bit_size: 1
    enum: LPMODE
  - name: FSUSP
    description: Force suspend.
    bit_offset: 3
    bit_size: 1
    enum: FSUSP
  - name: RESUME
    description: Resume request.
    bit_offset: 4
    bit_size: 1
    enum: RESUME
  - name: ESOFM
    description: Expected start of frame interrupt mask.
    bit_offset: 8
    bit_size: 1
    enum: ESOFM
  - name: SOFM
    description: Start of frame interrupt mask.
    bit_offset: 9
    bit_size: 1
    enum: SOFM
  - name: RESETM
    description: USB reset interrupt mask.
    bit_offset: 10
    bit_size: 1
    enum: RESETM
  - name: SUSPM
    description: Suspend mode interrupt mask.
    bit_offset: 11
    bit_size: 1
    enum: SUSPM
  - name: WKUPM
    description: Wakeup interrupt mask.
    bit_offset: 12
    bit_size: 1
    enum: WKUPM
  - name: ERRM
    description: Error interrupt mask.
    bit_offset: 13
    bit_size: 1
    enum: ERRM
  - name: PMAOVRM
    description: Packet memory area over / underrun interrupt mask.
    bit_offset: 14
    bit_size: 1
    enum: PMAOVRM
  - name: CTRM
    description: Correct transfer interrupt mask.
    bit_offset: 15
    bit_size: 1
    enum: CTRM
fieldset/DADDR:
  description: device address.
  fields:
  - name: ADD
    description: Device address.
    bit_offset: 0
    bit_size: 7
  - name: EF
    description: Enable function.
    bit_offset: 7
    bit_size: 1
    enum: EF
fieldset/EPR:
  description: endpoint %s register.
  fields:
  - name: EA
    description: Endpoint address.
    bit_offset: 0
    bit_size: 4
  - name: STAT_TX
    description: Status bits, for transmission transfers.
    bit_offset: 4
    bit_size: 2
    enum: STAT_TX
  - name: DTOG_TX
    description: Data Toggle, for transmission transfers.
    bit_offset: 6
    bit_size: 1
  - name: CTR_TX
    description: Correct Transfer for transmission.
    bit_offset: 7
    bit_size: 1
  - name: EP_KIND
    description: Endpoint kind.
    bit_offset: 8
    bit_size: 1
  - name: EP_TYPE
    description: Endpoint type.
    bit_offset: 9
    bit_size: 2
    enum: EP_TYPE
  - name: SETUP
    description: Setup transaction completed.
    bit_offset: 11
    bit_size: 1
  - name: STAT_RX
    description: Status bits, for reception transfers.
    bit_offset: 12
    bit_size: 2
    enum: STAT_RX
  - name: DTOG_RX
    description: Data Toggle, for reception transfers.
    bit_offset: 14
    bit_size: 1
  - name: CTR_RX
    description: Correct transfer for reception.
    bit_offset: 15
    bit_size: 1
fieldset/FNR:
  description: frame number register.
  fields:
  - name: FN
    description: Frame number.
    bit_offset: 0
    bit_size: 11
  - name: LSOF
    description: Lost SOF.
    bit_offset: 11
    bit_size: 2
  - name: LCK
    description: Locked.
    bit_offset: 13
    bit_size: 1
    enum: LCK
  - name: RXDM
    description: Receive data - line status.
    bit_offset: 14
    bit_size: 1
    enum: RXDM
  - name: RXDP
    description: Receive data + line status.
    bit_offset: 15
    bit_size: 1
    enum: RXDP
fieldset/ISTR:
  description: interrupt status register.
  fields:
  - name: EP_ID
    description: Endpoint Identifier.
    bit_offset: 0
    bit_size: 4
  - name: DIR
    description: Direction of transaction.
    bit_offset: 4
    bit_size: 1
    enum: DIR
  - name: ESOF
    description: Expected start frame.
    bit_offset: 8
    bit_size: 1
    enum: ESOF
  - name: SOF
    description: start of frame.
    bit_offset: 9
    bit_size: 1
    enum: SOF
  - name: RESET
    description: reset request.
    bit_offset: 10
    bit_size: 1
    enum: RESET
  - name: SUSP
    description: Suspend mode request.
    bit_offset: 11
    bit_size: 1
    enum: SUSP
  - name: WKUP
    description: Wakeup.
    bit_offset: 12
    bit_size: 1
    enum: WKUP
  - name: ERR
    description: Error.
    bit_offset: 13
    bit_size: 1
    enum: ERR
  - name: PMAOVR
    description: Packet memory area over / underrun.
    bit_offset: 14
    bit_size: 1
    enum: PMAOVR
  - name: CTR
    description: Correct transfer.
    bit_offset: 15
    bit_size: 1
    enum: CTR
enum/CTR:
  bit_size: 1
  variants:
  - name: Completed
    description: Endpoint has successfully completed a transaction.
    value: 1
enum/CTRM:
  bit_size: 1
  variants:
  - name: Disabled
    description: Correct Transfer (CTR) Interrupt disabled.
    value: 0
  - name: Enabled
    description: CTR Interrupt enabled, an interrupt request is generated when the corresponding bit in the USB_ISTR register is set.
    value: 1
enum/DIR:
  bit_size: 1
  variants:
  - name: To
    description: Data transmitted by the USB peripheral to the host PC.
    value: 0
  - name: From
    description: Data received by the USB peripheral from the host PC.
    value: 1
enum/EF:
  bit_size: 1
  variants:
  - name: Disabled
    description: USB device disabled.
    value: 0
  - name: Enabled
    description: USB device enabled.
    value: 1
enum/EP_TYPE:
  bit_size: 2
  variants:
  - name: Bulk
    description: Bulk endpoint.
    value: 0
  - name: Control
    description: Control endpoint.
    value: 1
  - name: Iso
    description: Iso endpoint.
    value: 2
  - name: Interrupt
    description: Interrupt endpoint.
    value: 3
enum/ERR:
  bit_size: 1
  variants:
  - name: R_NotOverrun_W_Clear
    description: Errors are not occurred.
    value: 0
  - name: Error
    description: One of No ANSwer, Cyclic Redundancy Check, Bit Stuffing or Framing format Violation error occurred.
    value: 1
enum/ERRM:
  bit_size: 1
  variants:
  - name: Disabled
    description: ERR Interrupt disabled.
    value: 0
  - name: Enabled
    description: ERR Interrupt enabled, an interrupt request is generated when the corresponding bit in the USB_ISTR register is set.
    value: 1
enum/ESOF:
  bit_size: 1
  variants:
  - name: R_NotExpectedStartOfFrame_W_Clear
    description: NotExpectedStartOfFrame.
    value: 0
  - name: ExpectedStartOfFrame
    description: An SOF packet is expected but not received.
    value: 1
enum/ESOFM:
  bit_size: 1
  variants:
  - name: Disabled
    description: ESOF Interrupt disabled.
    value: 0
  - name: Enabled
    description: ESOF Interrupt enabled, an interrupt request is generated when the corresponding bit in the USB_ISTR register is set.
    value: 1
enum/FRES:
  bit_size: 1
  variants:
  - name: NoReset
    description: Clear USB reset.
    value: 0
  - name: Reset
    description: Force a reset of the USB peripheral, exactly like a RESET signaling on the USB.
    value: 1
enum/FSUSP:
  bit_size: 1
  variants:
  - name: NoEffect
    description: No effect.
    value: 0
  - name: Suspend
    description: Enter suspend mode. Clocks and static power dissipation in the analog transceiver are left unaffected.
    value: 1
enum/LCK:
  bit_size: 1
  variants:
  - name: Locked
    description: the frame timer remains in this state until an USB reset or USB suspend event occurs.
    value: 1
enum/LPMODE:
  bit_size: 1
  variants:
  - name: Disabled
    description: No low-power mode.
    value: 0
  - name: Enabled
    description: Enter low-power mode.
    value: 1
enum/PDWN:
  bit_size: 1
  variants:
  - name: Disabled
    description: No power down.
    value: 0
  - name: Enabled
    description: Enter power down mode.
    value: 1
enum/PMAOVR:
  bit_size: 1
  variants:
  - name: R_NotOverrun_W_Clear
    description: Overrun is not occurred.
    value: 0
  - name: Overrun
    description: Microcontroller has not been able to respond in time to an USB memory request.
    value: 1
enum/PMAOVRM:
  bit_size: 1
  variants:
  - name: Disabled
    description: PMAOVR Interrupt disabled.
    value: 0
  - name: Enabled
    description: PMAOVR Interrupt enabled, an interrupt request is generated when the corresponding bit in the USB_ISTR register is set.
    value: 1
enum/RESET:
  bit_size: 1
  variants:
  - name: R_NotReset_W_Clear
    description: NotReset.
    value: 0
  - name: Reset
    description: Peripheral detects an active USB RESET signal at its inputs.
    value: 1
enum/RESETM:
  bit_size: 1
  variants:
  - name: Disabled
    description: RESET Interrupt disabled.
    value: 0
  - name: Enabled
    description: RESET Interrupt enabled, an interrupt request is generated when the corresponding bit in the USB_ISTR register is set.
    value: 1
enum/RESUME:
  bit_size: 1
  variants:
  - name: Requested
    description: Resume requested.
    value: 1
enum/RXDM:
  bit_size: 1
  variants:
  - name: Received
    description: received data minus upstream port data line.
    value: 1
enum/RXDP:
  bit_size: 1
  variants:
  - name: Received
    description: received data plus upstream port data line.
    value: 1
enum/SOF:
  bit_size: 1
  variants:
  - name: R_NotStartOfFrame_W_Clear
    description: NotStartOfFrame.
    value: 0
  - name: StartOfFrame
    description: Beginning of a new USB frame and it is set when a SOF packet arrives through the USB bus.
    value: 1
enum/SOFM:
  bit_size: 1
  variants:
  - name: Disabled
    description: SOF Interrupt disabled.
    value: 0
  - name: Enabled
    description: SOF Interrupt enabled, an interrupt request is generated when the corresponding bit in the USB_ISTR register is set.
    value: 1
enum/STAT_RX:
  bit_size: 2
  variants:
  - name: Disabled
    description: all reception requests addressed to this endpoint are ignored.
    value: 0
  - name: Stall
    description: the endpoint is stalled and all reception requests result in a STALL handshake.
    value: 1
  - name: Nak
    description: the endpoint is naked and all reception requests result in a NAK handshake.
    value: 2
  - name: Valid
    description: this endpoint is enabled for reception.
    value: 3
enum/STAT_TX:
  bit_size: 2
  variants:
  - name: Disabled
    description: all transmission requests addressed to this endpoint are ignored.
    value: 0
  - name: Stall
    description: the endpoint is stalled and all transmission requests result in a STALL handshake.
    value: 1
  - name: Nak
    description: the endpoint is naked and all transmission requests result in a NAK handshake.
    value: 2
  - name: Valid
    description: this endpoint is enabled for transmission.
    value: 3
enum/SUSP:
  bit_size: 1
  variants:
  - name: R_NotSuspend_W_Clear
    description: NotSuspend.
    value: 0
  - name: Suspend
    description: No traffic has been received for 3 ms, indicating a suspend mode request from the USB bus.
    value: 1
enum/SUSPM:
  bit_size: 1
  variants:
  - name: Disabled
    description: Suspend Mode Request SUSP Interrupt disabled.
    value: 0
  - name: Enabled
    description: SUSP Interrupt enabled, an interrupt request is generated when the corresponding bit in the USB_ISTR register is set.
    value: 1
enum/WKUP:
  bit_size: 1
  variants:
  - name: R_NotWakeup_W_Clear
    description: NotWakeup.
    value: 0
  - name: Wakeup
    description: Activity is detected that wakes up the USB peripheral.
    value: 1
enum/WKUPM:
  bit_size: 1
  variants:
  - name: Disabled
    description: WKUP Interrupt disabled.
    value: 0
  - name: Enabled
    description: WKUP Interrupt enabled, an interrupt request is generated when the corresponding bit in the USB_ISTR register is set.
    value: 1