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
Содержание Am186 CC
Страница 1: ...Am186 CC CH CU Microcontrollers User s Manual Order 21914B...
Страница 4: ...iv Am186 CC CH CU Microcontrollers User s Manual...
Страница 18: ...Table of Contents xviii Am186 CC CH CU Microcontrollers User s Manual...
Страница 24: ...Introduction xxiv Am186 CC CH CU Microcontrollers User s Manual...
Страница 39: ...Architectural Overview Am186 CC CH CU Microcontrollers User s Manual 1 15 Figure 1 6 32 Channel Linecard CH CC...
Страница 40: ...Architectural Overview 1 16 Am186 CC CH CU Microcontrollers User s Manual...
Страница 86: ...System Overview 3 36 Am186 CC CH CU Microcontrollers User s Manual...
Страница 92: ...Emulator Support 4 6 Am186 CC CH CU Microcontrollers User s Manual...
Страница 112: ...DRAM Controller 6 8 Am186 CC CH CU Microcontrollers User s Manual...
Страница 134: ...Interrupts 7 22 Am186 CC CH CU Microcontrollers User s Manual...
Страница 186: ...Programmable I O Signals 9 8 Am186 CC CH CU Microcontrollers User s Manual...
Страница 200: ...Watchdog Timer 11 6 Am186 CC CH CU Microcontrollers User s Manual...
Страница 232: ...Asynchronous Serial Ports UARTs 13 24 Am186 CC CH CU Microcontrollers User s Manual...
Страница 242: ...Synchronous Serial Port SSI 14 10 Am186 CC CH CU Microcontrollers User s Manual...
Страница 264: ...High Level Data Link Control HDLC 15 22 Am186 CC CH CU Microcontrollers User s Manual...
Страница 332: ...Universal Serial Bus USB 18 34 Am186 CC CH CU Microcontrollers User s Manual...
Страница 348: ...Register Summary A 16 Am186 CC CH CU Microcontrollers User s Manual...
Страница 376: ...Index Index 18 Am186 CC CH CU Microcontrollers User s Manual...