EasyManuals Logo

ST STM32F101xx User Manual

ST STM32F101xx
1096 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #853 background imageLoading...
Page #853 background image
RM0008 USB on-the-go full-speed (OTG_FS)
Doc ID 13902 Rev 12 853/1096
OTG_FS Host frame interval register (OTG_FS_HFIR)
Address offset: 0x404
Reset value: 0x0000 EA60
This register stores the frame interval information for the current speed to which the
OTG_FS controller has enumerated.
Bits 1:0 FSLSPCS: FS/LS PHY clock select
When the core is in FS host mode
01: PHY clock is running at 48 MHz
Others: Reserved
When the core is in LS host mode
00: Reserved
01: Select 48 MHz PHY clock frequency
10: Select 6 MHz PHY clock frequency
11: Reserved
Note: The FSLSPCS must be set on a connection event according to the speed of the
connected device (after changing this bit, a software reset must be performed).
313029282726252423222120191817161514131211109876543210
Reserved
FRIVL
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
Bits 31:16 Reserved
Bits 15:0 FRIVL: Frame interval
The value that the application programs to this field specifies the interval between two
consecutive SOFs (FS) or Keep-Alive tokens (LS). This field contains the number of PHY
clocks that constitute the required frame interval. The application can write a value to this
register only after the Port enable bit of the host port control and status register (PENA bit in
OTG_FS_HPRT) has been set. If no value is programmed, the core calculates the value based
on the PHY clock specified in the FS/LS PHY Clock Select field of the host configuration
register (FSLSPCS in OTG_FS_HCFG). Do not change the value of this field after the initial
configuration.
1 ms × (PHY clock frequency)

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the ST STM32F101xx and is the answer not in the manual?

ST STM32F101xx Specifications

General IconGeneral
BrandST
ModelSTM32F101xx
CategoryMicrocontrollers
LanguageEnglish

Related product manuals