
Universal Serial Bus Interface – On-The-Go Module
Freescale Semiconductor
21-17
21.3.3.1
USB Command Register (USBCMD)
The module executes the command indicated in this register.
Address: 0xFC0B_0140 (USBCMD)
Access: User read/write
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
R
0
0
0
0
0
0
0
0
ITC
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
FS2 ATDTW SUTW
0
ASPE
0
ASP
0
IAA
ASE
PSE
FS1
FS0
RST
RS
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 21-15. USB Command Register (USBCMD)
Table 21-17. USBCMD Field Descriptions
Field
Description
31–24
Reserved, must be cleared.
23–16
ITC
Interrupt threshold control. System software uses this field to set the maximum rate at which the module issueS
interrupts. ITC contains maximum interrupt interval measured in microframes.
0x00 Immediate (no threshold)
0x01 1 microframe
0x02 2 microframes
0x04 4 microframes
0x08 8 microframes
0x10 16 microframes
0x20 32 microframes
0x40 64 microframes
Else Reserved
15
FS2
See the FS bit description below. This is a non-EHCI bit.
14
ATDTW
Add dTD TripWire. This is a non-EHCI bit, that is present on the USB OTG module only. This bit is used as a
semaphore when a dTD is added to an active (primed) endpoint. This bit is set and cleared by software. This
bit is also cleared by hardware when the state machine is in a hazard region where adding a dTD to a primed
endpoint may go unrecognized. More information appears in
Section 21.5.3.6.3, “Executing a Transfer
13
SUTW
Setup TripWire. A non-EHCI bit present on the USB OTG module only. Used as a semaphore to ensure that
the setup data payload of 8 bytes is extracted from a QH by driver software without being corrupted. If the setup
lockout mode is off (USBMODE[SLOM] = 1) then a hazard exists when new setup data arrives, and the
software copies setup from the QH for a previous setup packet. This bit is set and cleared by software and is
cleared by hardware when a hazard exists. More information appears in
Section 21.5.3.4.4, “Control Endpoint
12
Reserved, must be cleared.
11
ASPE
Asynchronous schedule park mode enable. Software uses this bit to enable or disable park mode.
1 Park mode enabled
0 Park mode disabled
10
Reserved, must be cleared.
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...