
Universal Serial Bus Interface – On-The-Go Module
Freescale Semiconductor
21-23
21.3.3.4
Frame Index Register (FRINDEX)
In host mode, the controller uses this register to index the periodic frame list. The register updates every
125 microseconds (once each microframe). Bits [N–3] select a particular entry in the periodic frame list
during periodic schedule execution. The number of bits used for the index depends on the size of the frame
list as set by system software in the USBCMD[FS] field.
This register must be a longword. Byte writes produce undefined results. This register cannot be written
unless the USB OTG controller is in halted state as the USBSTS[HCH] bit indicates. A write to this
register while the USBSTS[RS] bit is set produces undefined results. Writes to this register also affect the
SOF value.
In device mode (USB OTG-only), this register is read-only, and the USB OTG controller updates the
FRINDEX[13–3] bits from the frame number the SOF marker indicates. When the USB bus receives a
SOF, FRINDEX[13–3] checks against the SOF marker. If FRINDEX[13–3] is different from the SOF
marker, FRINDEX[13–3] is set to the SOF value and FRINDEX[2–0] is cleared (SOF for 1 ms frame). If
FRINDEX[13–3] equals the SOF value, FRINDEX[2–0] is incremented (SOF for 125
μ
sec microframe.)
3
FRE
Frame list rollover enable. When this bit and the USBSTS[FRI] bit are set, controller issues an interrupt.
Software clearing the USBSTS[FRI] bit acknowledges the interrupt. Used only in host mode.
0 Disabled
1 Enabled
2
PCE
Port change detect enable. When this bit and the USBSTS[PCI] bit are set, controller issues an interrupt.
Software clearing the USBSTS[PCI] bit acknowledges the interrupt.
0 Disabled
1 Enabled
1
UEE
USB error interrupt enable. When this bit and the USBSTS[UEI] bit are set, controller issues an interrupt at the
next interrupt threshold. Software clearing the USBSTS[UEI] bit acknowledges the interrupt.
0 Disabled
1 Enabled
0
UE
USB interrupt enable. When this bit is 1 and the USBSTS[UI] bit is set, the USB OTG controller issues an
interrupt at the next interrupt threshold. Software clearing the USBSTS[UI] bit acknowledges the interrupt.
0 Disabled
1 Enabled
Address: 0xFC0B_014C (FRINDEX)
Access: User read/write
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
R 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
FRINDEX
W
Reset 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 21-18. Frame Index Register (FRINDEX)
Table 21-19. USBINTR Field Descriptions (continued)
Field
Description
MCF5329 Reference Manual, Rev 3
Summary of Contents for MCF5329
Page 106: ...ColdFire Core 3 32 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 148: ...Cache 5 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 154: ...Static RAM SRAM 6 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 184: ...Power Management 8 18 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 204: ...Reset Controller Module 10 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 220: ...System Control Module SCM 11 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 228: ...Crossbar Switch XBS 12 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 268: ...General Purpose I O Module 13 40 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 392: ...SDRAM Controller SDRAMC 18 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 436: ...Fast Ethernet Controller FEC 19 44 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 594: ...FlexCAN 23 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 678: ...Pulse Width Modulation PWM Module 26 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 684: ...Watchdog Timer Module 27 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 704: ...DMA Timers DTIM0 DTIM3 29 12 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 754: ...UART Modules 31 34 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 770: ...I2 C Interface 32 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 866: ...Debug Module 36 50 Freescale Semiconductor MCF5329 Reference Manual Rev 3...