ST STM32F413 Reference Manual page 1176

Advanced arm-based 32-bit mcus

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USB on-the-go full-speed (OTG_FS)

Bit 16 EONUM: Even/odd frame

DPID: Endpoint data PID

Bit 15 USBAEP: USB active endpoint

Bits 14:11 Reserved, must be kept at reset value.

Bits 10:0 MPSIZ: Maximum packet size

33.15.42 OTG device control OUT endpoint 0 control register

(OTG_DOEPCTL0)

Address offset: 0xB00

Reset value: 0x0000 8000

This section describes the OTG_DOEPCTL0 register. Nonzero control endpoints use

registers for endpoints 1–3.

Applies to isochronous IN endpoints only.

Indicates the frame number in which the core transmits/receives isochronous data for this

endpoint. The application must program the even/odd frame number in which it intends to

transmit/receive isochronous data for this endpoint using the SEVNFRM and SODDFRM

fields in this register.

0: Even frame

1: Odd frame

Applies to interrupt/bulk IN endpoints only.

Contains the PID of the packet to be received or transmitted on this endpoint. The

application must program the PID of the first packet to be received or transmitted on this

endpoint, after the endpoint is activated. The application uses the SD0PID register field to

program either DATA0 or DATA1 PID.

Indicates whether this endpoint is active in the current configuration and interface. The core

clears this bit for all endpoints (other than EP 0) after detecting a USB reset. After receiving

the SetConfiguration and SetInterface commands, the application must program endpoint

registers accordingly and set this bit.

The application must program this field with the maximum packet size for the current logical

endpoint. This value is in bytes.

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