mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 986

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

On-The-Go Operation
39.7 On-The-Go Operation
The USB-OTG core provides sensors and controls to enable On-The-Go (OTG)
operation. These sensors are used by the OTG API software to implement the Host
Negotiation Protocol (HNP) and Session Request Protocol (SRP). API calls are provided
to give access the OTG protocol control signals, and include the OTG capabilities in the
device application. The following state machines show the OTG operations involved with
HNP and SRP protocols from either end of the USB cable.
39.7.1 OTG Dual Role A Device Operation
A device is considered the A device because of the type of cable attached. If the USB
Type A connector or the USB Type Mini A connector is plugged into the device, he is
considered the A device.
A dual role A device operates as the following flow diagram and state description table
illustrates.
A_IDLE
B_IDLE
A_WAIT_VFALL
A_WAIT_VRISE
A_PERIPHERAL
A_WAIT_BCON
A_SUSPEND
A_HOST
Figure 39-93. Dual Role A Device Flow Diagram
MCF51JF128 Reference Manual, Rev. 2, 03/2011
Preliminary
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