
Universal Serial Bus Interface – On-The-Go Module
21-24
Freescale Semiconductor
illustrates values of N based on the value of the USBCMD[FS] field when used in host mode.
21.3.3.5
Periodic Frame List Base Address Register (PERIODICLISTBASE)
This register contains the beginning address of the periodic frame list in the system memory. The host
controller driver loads this register prior to starting the schedule execution by the controller. The memory
structure referenced by this physical memory pointer assumes to be 4-Kbyte aligned. The contents
combine with the FRINDEX register to enable the controller to step through the periodic frame list in
sequence.
On the USB OTG module, the host and device mode functions share this register. In host mode, it is the
PERIODICLISTBASE register; in device mode, it is the DEVICEADDR register. See
“Device Address Register (DEVICEADDR),”
for more information.
Table 21-20. FRINDEX Field Descriptions
Field
Description
31–14
Reserved, must be cleared.
13–0
FRINDEX
Frame index. The value in this register increments at the end of each time frame (microframe). Bits [N– 3] are
for the frame list current index. This means each location of the frame list is accessed 8 times per frame (once
each microframe) before moving to the next index.
In device mode for the USB OTG module, the value is the current frame number of the last frame transmitted
and not used as an index.
In either mode, bits 2–0 indicate current microframe.
Table 21-21. FRINDEX N Values
USBCMD[FS]
Frame List Size
FRINDEX N value
000
1024 elements (4096 bytes)
12
001
512 elements (2048 bytes)
11
010
256 elements (1024 bytes)
10
011
128 elements (512 bytes)
9
100
64 elements (256 bytes)
8
101
32 elements (128 bytes)
7
110
16 elements (64 bytes)
6
111
8 elements (32 bytes)
5
Address: 0xFC0B_0154 (PERIODICLISTBASE)
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
PERBASE
0
0
0
0
0
0
0
0
0
0
0
0
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 21-19. Periodic Frame List Base Address Register (PERIODICLISTBASE)
MCF5329 Reference Manual, Rev 3
Содержание MCF5329
Страница 106: ...ColdFire Core 3 32 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 126: ...Enhanced Multiply Accumulate Unit EMAC 4 20 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 148: ...Cache 5 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 154: ...Static RAM SRAM 6 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 184: ...Power Management 8 18 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 204: ...Reset Controller Module 10 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 220: ...System Control Module SCM 11 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 228: ...Crossbar Switch XBS 12 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 268: ...General Purpose I O Module 13 40 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 392: ...SDRAM Controller SDRAMC 18 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 436: ...Fast Ethernet Controller FEC 19 44 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 564: ...Liquid Crystal Display Controller LCDC 22 44 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 594: ...FlexCAN 23 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 678: ...Pulse Width Modulation PWM Module 26 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 684: ...Watchdog Timer Module 27 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 692: ...Programmable Interrupt Timers PIT0 PIT3 28 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 704: ...DMA Timers DTIM0 DTIM3 29 12 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 720: ...Queued Serial Peripheral Interface QSPI 30 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 754: ...UART Modules 31 34 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 770: ...I2 C Interface 32 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 790: ...Message Digest Hardware Accelerator MDHA 33 20 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 866: ...Debug Module 36 50 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 902: ...Register Memory Map Quick Reference A 26 Freescale Semiconductor MCF5329 Reference Manual Rev 3...