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Universal Serial Bus Interface – On-The-Go Module
Freescale Semiconductor
21-5
21.1.4.1
Low-Power Modes
The USB OTG module is integrated with the processor’s low-power modes (stop, doze and wait). The
modes are implemented as follows:
•
Stop — The processor stops the clock to the USB OTG module. In this state, the USB OTG module
ignores traffic on the USB and does not generate any interrupts or wake-up events. The on-chip
transceiver is disabled to save power.
•
Wait — The clocks to the USB OTG module are running.
•
Doze — The processor stops the system clocks to the USB OTG module, but the 60 MHz
transceiver clock remains active. In doze mode, detection of resume signaling initiates a restart of
the module clocks.
21.2
External Signal Description
describes the external signal functionality of the USB OTG module.
NOTE
The ULPI signals are multiplexed with the FEC module. This section
describes the signal functions when in ULPI mode; refer to
for more details.
Table 21-2. USB OTG Signal Descriptions
Signal
I/O
Description
On-chip FS/LS transceiver
USB_CLKIN
I
Optional 60 MHz clock source. This signal is also used for the input clock from a ULPI PHY.
USBOTG_DM
I/O Data minus. Output of dual-speed transceiver for the USB OTG module.
State
Meaning
Asserted—Data 1
Negated—Data 0
Timing Asynchronous
USBOTG_DP
I/O Data plus. Output of dual-speed transceiver for the USB OTG module.
State
Meaning
Asserted—Data 1
Negated—Data 0
Timing Asynchronous
USBOTG_PU_EN
O
Enables an external pull-up on the USBOTG_DP line. This signal is controlled by the
UOCSR[BVLD] bit.
State
Meaning
Asserted—Pull-up enabled. UOCSR[BVLD] set.
Negated—Pull-up disabled. UOCSR[BVLD] cleared.
Timing Asynchronous
ULPI Interface
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...