MC68HC705J1ACDW Freescale Semiconductor, MC68HC705J1ACDW Datasheet - Page 106

IC MCU 4MHZ 1.2K OTP 20-SOIC

MC68HC705J1ACDW

Manufacturer Part Number
MC68HC705J1ACDW
Description
IC MCU 4MHZ 1.2K OTP 20-SOIC
Manufacturer
Freescale Semiconductor
Series
HC05r
Datasheet

Specifications of MC68HC705J1ACDW

Core Processor
HC05
Core Size
8-Bit
Speed
4MHz
Peripherals
POR, WDT
Number Of I /o
14
Program Memory Size
1.2KB (1.2K x 8)
Program Memory Type
OTP
Ram Size
64 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
20-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
Connectivity
-

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External Interrupt Module (IRQ)
8.4 IRQ Status and Control Register
Technical Data
Address:
The IRQ status and control register (ISCR) controls and monitors
operation of the IRQ module. All unused bits in the ISCR read as
logic 0s. The IRQF bit is cleared and the IRQE bit is set by reset.
IRQR — Interrupt Request Reset Bit
IRQF — External Interrupt Request Flag
IRQE — External Interrupt Request Enable Bit
The STOP and WAIT instructions set the IRQE bit so that an external
interrupt can bring the MCU out of these low-power modes. In addition,
reset sets the I bit which masks all interrupt sources.
Reset:
Read:
Write:
This write-only bit clears the external interrupt request flag.
The external interrupt request flag is a clearable, read-only bit that is
set when an external interrupt request is pending. Reset clears the
IRQF bit.
This read/write bit enables external interrupts. Reset sets the IRQE
bit.
Freescale Semiconductor, Inc.
For More Information On This Product,
1 = Clears external interrupt and IRQF bit
0 = No effect on external interrupt and IRQF bit
1 = External interrupt request pending
0 = No external interrupt request pending
1 = External interrupt requests enabled
0 = External interrupt requests disabled
Figure 8-3. IRQ Status and Control Register (ISCR)
$000A
IRQE
Bit 7
1
External Interrupt Module (IRQ)
Go to: www.freescale.com
= Unimplemented
6
0
0
5
0
0
R
4
0
0
R = Reserved
IRQF
3
0
MC68HC705J1A — Rev. 4.0
2
0
0
IRQR
1
0
0
Bit 0
0
0

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