MC68HC908QY4CP Freescale Semiconductor, MC68HC908QY4CP Datasheet - Page 77

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MC68HC908QY4CP

Manufacturer Part Number
MC68HC908QY4CP
Description
IC MCU 4K FLASH W/ADC 16-DIP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet

Specifications of MC68HC908QY4CP

Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Peripherals
LVD, POR, PWM
Number Of I /o
13
Program Memory Size
4KB (4K 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-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Connectivity
-

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8.7.1 IRQ Input Pins (IRQ)
The IRQ pin provides a maskable external interrupt source. The IRQ pin contains an internal pullup
device.
8.8 Registers
The IRQ status and control register (INTSCR) controls and monitors operation of the IRQ module. See
Chapter 5 Configuration Register
The INTSCR has the following functions:
IRQF — IRQ Flag
ACK — IRQ Interrupt Request Acknowledge Bit
IMASK — IRQ Interrupt Mask Bit
MODE — IRQ Edge/Level Select Bit
Freescale Semiconductor
This read-only status bit is set when the IRQ interrupt is pending.
Writing a 1 to this write-only bit clears the IRQ latch. ACK always reads as 0.
Writing a 1 to this read/write bit disables the IRQ interrupt request.
This read/write bit controls the triggering sensitivity of the IRQ pin.
1 = IRQ interrupt pending
0 = IRQ interrupt not pending
1 = IRQ interrupt request disabled
0 = IRQ interrupt request enabled
1 = IRQ interrupt request on falling edges and low levels
0 = IRQ interrupt request on falling edges only
Shows the state of the IRQ flag
Clears the IRQ latch
Masks the IRQ interrupt request
Controls triggering sensitivity of the IRQ interrupt pin
Address: $001D
Reset:
Read:
Write:
Figure 8-3. IRQ Status and Control Register (INTSCR)
Bit 7
0
0
= Unimplemented
MC68HC908QY/QT Family Data Sheet, Rev. 6
(CONFIG).
6
0
0
5
0
0
4
0
0
IRQF
3
0
ACK
2
0
0
IMASK
1
0
MODE
Bit 0
0
Registers
77

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