MC908QY2CDTER Freescale Semiconductor, MC908QY2CDTER Datasheet - Page 73
MC908QY2CDTER
Manufacturer Part Number
MC908QY2CDTER
Description
IC MCU 8BIT 1.5K FLASH 16TSSOP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908QY4MDWER.pdf
(184 pages)
Specifications of MC908QY2CDTER
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Peripherals
LVD, POR, PWM
Number Of I /o
13
Program Memory Size
1.5KB (1.5K x 8)
Program Memory Type
FLASH
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 4x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
16-TSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Connectivity
-
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Chapter 8
External Interrupt (IRQ)
8.1 Introduction
The IRQ pin (external interrupt), shared with PTA2 (general purpose input) and keyboard interrupt (KBI),
provides a maskable interrupt input
8.2 Features
Features of the IRQ module include the following:
8.3 Functional Description
IRQ pin functionality is enabled by setting configuration register 2 (CONFIG2) IRQEN bit accordingly. A
zero disables the IRQ function and PTA2 will assume the other shared functionalities. A one enables the
IRQ function.
A low level applied to the external interrupt request (IRQ) pin can latch a CPU interrupt request.
Figure 8-2
Interrupt signals on the IRQ pin are latched into the IRQ latch. The IRQ latch remains set until one of the
following actions occurs:
The external interrupt pin is falling-edge-triggered out of reset and is software-configurable to be either
falling-edge or falling-edge and low-level triggered. The MODE bit in INTSCR controls the triggering
sensitivity of the IRQ pin.
Freescale Semiconductor
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External interrupt pin, IRQ
IRQ interrupt control bits
Programmable edge-only or edge and level interrupt sensitivity
Automatic interrupt acknowledge
Selectable internal pullup resistor
IRQ vector fetch — An IRQ vector fetch automatically generates an interrupt acknowledge signal
that clears the IRQ latch.
Software clear — Software can clear the IRQ latch by writing a 1 to the ACK bit in the interrupt
status and control register (INTSCR).
Reset — A reset automatically clears the IRQ latch.
shows the structure of the IRQ module.
MC68HC908QY/QT Family Data Sheet, Rev. 6
73
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