Universal Serial Bus (USB)
Am186™CC/CH/CU Microcontrollers User’s Manual
18-31
18.5.12.2
Interrupt Endpoint Definition
The Am186CC and Am186CU microcontrollers each provide one dedicated interrupt
endpoint. Typically, all of the USB Device Class specifications require that a USB device
contain at least one interrupt endpoint. The USB host uses this endpoint, in conjunction
with the device’s control endpoint, to process class-specific transactions and to generally
service specific device requests when required.
The interrupt endpoint features are highly programmable. Device software can modify these
features at any time in response to the various commands issued to the device’s control
endpoint. The USB host can make these requests during the device enumeration process
or at any other time during the device operation. Table 18-8 lists the interrupt endpoint
features.
Table 18-7
Control Endpoint Definition
Parameter
Value
USB Parameters
Number
0
Configuration
All
Interface
All
Alternate Setting
All
Type
Control
Maximum Packet Size
Eight bytes
System Parameters
Data Handling
Polled I/O or interrupt driven
FIFO Depth
Eight bytes
Table 18-8
Interrupt Endpoint Definition
Parameter
Value
USB Parameters
Number
1–15
Configuration
0–3
Interface
0–3
Direction
IN (to host only)
Alternate Setting
0–7
Type
Interrupt
Max Packet Size
8 or 16 bytes
System Parameters
Data Handling
Polled I/O or interrupt driven
FIFO Depth
16 bytes
Summary of Contents for Am186 CC
Page 1: ...Am186 CC CH CU Microcontrollers User s Manual Order 21914B...
Page 4: ...iv Am186 CC CH CU Microcontrollers User s Manual...
Page 18: ...Table of Contents xviii Am186 CC CH CU Microcontrollers User s Manual...
Page 24: ...Introduction xxiv Am186 CC CH CU Microcontrollers User s Manual...
Page 40: ...Architectural Overview 1 16 Am186 CC CH CU Microcontrollers User s Manual...
Page 86: ...System Overview 3 36 Am186 CC CH CU Microcontrollers User s Manual...
Page 92: ...Emulator Support 4 6 Am186 CC CH CU Microcontrollers User s Manual...
Page 112: ...DRAM Controller 6 8 Am186 CC CH CU Microcontrollers User s Manual...
Page 134: ...Interrupts 7 22 Am186 CC CH CU Microcontrollers User s Manual...
Page 186: ...Programmable I O Signals 9 8 Am186 CC CH CU Microcontrollers User s Manual...
Page 200: ...Watchdog Timer 11 6 Am186 CC CH CU Microcontrollers User s Manual...
Page 232: ...Asynchronous Serial Ports UARTs 13 24 Am186 CC CH CU Microcontrollers User s Manual...
Page 242: ...Synchronous Serial Port SSI 14 10 Am186 CC CH CU Microcontrollers User s Manual...
Page 264: ...High Level Data Link Control HDLC 15 22 Am186 CC CH CU Microcontrollers User s Manual...
Page 332: ...Universal Serial Bus USB 18 34 Am186 CC CH CU Microcontrollers User s Manual...
Page 348: ...Register Summary A 16 Am186 CC CH CU Microcontrollers User s Manual...
Page 376: ...Index Index 18 Am186 CC CH CU Microcontrollers User s Manual...