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Interrupts
Am186™CC/CH/CU Microcontrollers User’s Manual
7-17
Notes:
1. Channels 0 to 3 and 8 to 13 can have only one interrupt source active at a time (e.g., Channel 2 can only service
the INT1 signal or the USB at any one time). Channels 4 to 7 (shaded) can service up to two sources at once (e.g.,
Channel 4 can service the HDLC_A as well as SDMA0 interrupt requests). The peripherals that generate the inter-
rupts on channels 4 to 7 have the option of enabling or disabling their requests. Channel 14 (shaded) is provided to
allow a second channel to service interrupt requests from external signals. This is useful for systems that require a
large number of peripheral interrupts (e.g., if a system is using USB interrupts via Channel 2, the INT1 signal is able
to request an interrupt through Channel 14). Channel 14 can simultaneously service any source indicated in its col-
umn. For Channel 14, a register individually masks on or off the signals serviced by this channel so that individual
control of interrupt sources is possible.
2. For a complete description of Pulse Width Demodulation (PWD) mode, see Chapter 10, “Programmable Timers.”
Table 7-5
Interrupt Channel Sources
Interrupt
Channel
Default Source
Optional Source
0
Timer 0, Timer 1, and Timer 2
—
1
INT0
—
2
INT1
USB
3
INT2
High-Speed UART
4
HDLC Channel A
and
SmartDMA Channel Pair 0
—
5
HDLC Channel B
and
SmartDMA Channel Pair 1
—
6
HDLC Channel C
and
SmartDMA Channel Pair 2
—
7
HDLC Channel D
and
SmartDMA Channel Pair 3
—
8
INT3
GCI
9
INT4
General-Purpose DMA 0 and 1
10
INT5
General-Purpose DMA 2 and 3
11
INT6
UART
12
INT7
PWD
1
Notes:
1. The PWD source is selected by setting the PWD bit in the SYSCON register.
13
INT8
PWD
14
Shared Request
2
2. The Shared Request source is controlled by the SHREQ and SHMASK registers. The following
sources can be enabled to use the Shared Request channel: PIO5, PIO15, PIO27, PIO29, PIO30,
PIO33, PIO34, and PIO35; and INT pins 7–1.
—
CC
CU
CC
CH
CC
CH
CC
CH
CC
CH
CC
CC
CU
CC
CC
CU
CC
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...