
Universal Serial Bus Interface – On-The-Go Module
21-34
Freescale Semiconductor
7
SUSP
Suspend
0 Port not in suspend state.
1 Port in suspend state.
Host mode (USB host and USB OTG):
The PE and SUSP bits define the port state as follows:
When in suspend state, downstream propagation of data is blocked on this port, except for port reset. The
blocking occurs at the end of the current transaction if a transaction was in progress when this bit was set. In the
suspend state, the port is sensitive to resume detection. The bit status does not change until the port is
suspended and there may be a delay in suspending a port if there is a transaction currently in progress on the
USB.
The module unconditionally clears this bit when software clears the FPR bit. The host controller ignores clearing
this bit. If host software sets this bit when the port is not enabled (PE = 0), the results are undefined.
This field is cleared if the PP bit is cleared in host mode.
Device mode (USB OTG only):
In device mode, this bit is a read-only status bit.
6
FPR
Force Port Resume. This bit is not-EHCI compatible.
0 No resume (K-state) detected/driven on port.
1 Resume detected/driven on port.
Host mode (USB host and USB OTG):
Software sets this bit to drive resume signaling. The controller sets this bit if a J-to-K transition is detected while
the port is in suspend state (PE = SUSP = 1), which in turn sets the USBSTS[PCI] bit. This bit automatically
clears after the resume sequence is complete. This behavior is different from EHCI where the host controller
driver is required to clear this bit after the resume duration is timed in the driver.
When the controller owns the port, the resume sequence follows the defined sequence documented in the USB
Specification Revision 2.0. The resume signaling (full-speed K) is driven on the port as long as this bit remains
set. This bit remains set until the port switches to the high-speed idle. Clearing this bit has no affect because the
port controller times the resume operation to clear the bit the port control state switches to HS or FS idle.
This field is cleared if the PP bit is cleared in host mode.
Device mode (USB OTG only):
After the device is in suspend state for 5 ms or more, software must set this bit to drive resume signaling before
clearing. The device controller sets this bit if a J-to-K transition is detected while port is in suspend state, which
in turn sets the USBSTS[PCI] bit. The bit is cleared when the device returns to normal operation.
5
OCC
Over-current change. Indicates a change to the OCA bit. Software clears this bit by writing a 1. For host mode, the
user can provide over-current detection to the USBn_PWRFAULT signal for this condition. For device-only
implementations (USB OTG only), this bit must always be cleared.
0 No over-current.
1 Over-current detect.
4
OCA
Over-current active. This bit automatically transitions from 1 to 0 when the over-current condition is removed. For
host/OTG implementations, the user can provide over-current detection to the USBn_PWRFAULT signal for this
condition. For device-only implementations (USB OTG only), this bit must always be cleared.
0 Port not in over-current condition.
1 Port currently in over-current condition.
Table 21-31. PORTSC1 Field Descriptions (continued)
Field
Description
PE
SUSP
Port State
0
x
Disable
1
0
Enable
1
1
Suspend
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...