Usb Frame Value Register (Usbframe), Offset 0X00C; Usb Endpoint Index Register (Usbepidx), Offset 0X00E; Frame Number Register (Frame); Usb Endpoint Index Register (Usbepidx) - Texas Instruments Concerto F28M35 Series Technical Reference Manual

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18.5.9 USB Frame Value Register (USBFRAME), offset 0x00C

The frame number 16-bit read-only register (USBFRAME) holds the last received frame number.
Mode(s): OTG A or Host
USBFRAME is shown in
15
Reserved
R-0
LEGEND: R = Read only; -n = value after reset
Bit Field
15-11 Reserved
10-0 FRAME

18.5.10 USB Endpoint Index Register (USBEPIDX), offset 0x00E

Each endpoint's buffer can be accessed by configuring a FIFO size and starting address. The endpoint
index 16-bit register (USBEPIDX) is used with the USBTXFIFOSZ, USBRXFIFOSZ, USBTXFIFOADD,
and USBRXFIFOADD registers.
Mode(s): OTG A or Host
USBEPIDX is shown in
7
Reserved
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 18-17. USB Endpoint Index Register (USBEPIDX) Field Descriptions
Bit Field Value
7-4 Reserved 0
3-0 EPIDX 0-4h
SPRUH22I – April 2012 – Revised November 2019
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OTG B or Device
Figure 18-13 and described in
Figure 18-13. Frame Number Register (FRAME)
11 10
Table 18-16. Frame Number Register (FRAME) Field Descriptions
Value Description
0 Reserved
0-7FFh Last received frame number
OTG B or Device
Figure 18-14 and described in
Figure 18-14. USB Endpoint Index Register (USBEPIDX)
4
R-0
Description
Reserved
Endpoint Index. This bit field configures which endpoint is accessed when reading or writing to one of
the USB controller's indexed registers. A value of 0x0 corresponds to Endpoint 0 and a value of 0xF
corresponds to Endpoint 15.
Copyright © 2012–2019, Texas Instruments Incorporated
Table 18-16.
FRAME
R-0
Table 18-17.
3
EPIDX
R/W-0
M3 Universal Serial Bus (USB) Controller
Register Descriptions
0
0
1315