pca82c200t NXP Semiconductors, pca82c200t Datasheet - Page 64
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pca82c200t
Manufacturer Part Number
pca82c200t
Description
8-bit Microcontroller With On-chip Can
Manufacturer
NXP Semiconductors
Datasheet
1.PCA82C200T.pdf
(108 pages)
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Philips Semiconductors
14 INTERRUPT SYSTEM
External events and the real-time-driven on-chip
peripherals require service by the CPU asynchronous to
the execution of any particular section of code. To tie the
asynchronous activities of these functions to normal
program execution a multiple-source, two-priority-level,
nested interrupt system is provided. Interrupt response
latency is from 2.25 s to 7.5 s when using a 16 MHz
crystal. The latency time strongly depends on the
sequence of instructions executed directly after an
interrupt request. During a CAN-DMA transfer the interrupt
system is disabled (see Section 13.5.17). The P8xCE598
acknowledges interrupt requests from fifteen sources as
follows:
Each interrupt vectors to a separate location in Program
Memory for its service program. Each source can be
individually enabled or disabled by a corresponding bit in
the IEN0 or IEN1 register, moreover each interrupt may be
programmed to a HIGH or LOW priority level using a
corresponding bit in the IP0 or IP1 register. Also all
enabled sources can be globally disabled or enabled. Both
external interrupts can be programmed to be
level-activated or transition-activated, and an active LOW
level allows ‘wire-ORing’ of several interrupt sources to the
input pin.
1996 Jun 27
INT0 and INT1: externally via pins 43 and 44
respectively
Timer 0 and Timer 1: from the two internal counters
– If the capture function remains unused and the
Timer T2, 8 separate interrupts:
– 4 capture interrupts
– 3 compare interrupts
– An overflow interrupt.
ADC end-of-conversion interrupt
CAN Controller interrupt
UART serial I/O port interrupt.
8-bit microcontroller with on-chip CAN
Capture Register contents are ‘don't care’ then the
corresponding input pins ‘CTnI’, with ‘n = 0 ... 3’, may
be used as positive and/or negative edge triggered
external interrupts INT2 to INT5. But note that they
can not terminate the Idle mode because the Timer 2
is switched off then.
64
Product specification
P8xCE598
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