MC68HC705V12CFN MOTOROLA [Motorola, Inc], MC68HC705V12CFN Datasheet - Page 62
![no-image](/images/no-image-200.jpg)
MC68HC705V12CFN
Manufacturer Part Number
MC68HC705V12CFN
Description
The Motorola microcontroller
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC705V12CFN.pdf
(248 pages)
- Current page: 62 of 248
- Download datasheet (2Mb)
Interrupts
4.7.1 IRQ Status and Control Register
Advance Information
62
NOTE:
Address:
these features permit the safe use of read-modify-write instructions (for
instance, BSET and BCLR) on the ISCR.
Although read-modify-write instruction use is allowable on the ISCR,
shift operations should be avoided due to the possibility of inadvertently
setting the IRQA.
The IRQ interrupt function is controlled by the IRQ status and control
register (ISCR) located at $001F. All unused bits in the ISCR will read as
logic 0s. The IRQF bit is cleared and IRQE bit is set by reset.
IRQE — IRQ Interrupt Enable Bit
IPCE — Port C IRQ Interrupt Enable Bit
Reset:
Read:
Write:
The IRQE bit controls whether the IRQF flag bit can or cannot initiate
an IRQ interrupt sequence. If the IRQE enable bit is set, the IRQF flag
bit can generate an interrupt sequence. If the IRQE enable bit is
cleared, the IRQF flag bit cannot generate an interrupt sequence.
Reset sets the IRQE enable bit, thereby enabling IRQ interrupts once
the I bit is cleared. Execution of the STOP or WAIT instructions
causes the IRQE bit to be set to allow the external IRQ to exit these
modes. In addition, reset also sets the I bit, which masks all interrupt
sources.
The IPCE bit controls whether the IPCF flag bit can or cannot initiate
an IRQ interrupt sequence. If the IPCE enable bit is set, the IPCF flag
bit will generate an interrupt sequence. If the IPCE enable bit is
Figure 4-3. IRQ Status and Control Register (ISCR)
$001F
IRQE
Bit 7
1
= Unimplemented
6
0
0
Interrupts
IPCE
5
0
4
0
0
IRQF
3
0
MC68HC705V12
2
0
0
IPCF
1
0
MOTOROLA
—
Rev. 3.0
IRQA
Bit 0
0
0
Related parts for MC68HC705V12CFN
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![MC68HC705](/images/no-image3.png)
Part Number:
Description:
HCMOS Microcontroller Unit
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
![MC1723L](/images/manufacturer_photos/0/4/459/motorola_tmb.jpg)
Part Number:
Description:
Motorola, Inc [VOLTAGE REGULATOR]
Manufacturer:
Motorola
Datasheet:
![MPQ1000](/images/no-image3.png)
Part Number:
Description:
6367254 MOTOROLA SC (XSTRS/R F)
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
![MC1494L](/images/manufacturer_photos/0/4/459/motorola_tmb.jpg)
Part Number:
Description:
MC1494LMotorola, Inc [MONOLITHIC FOUR-QUADRANT MULTIPLIER]
Manufacturer:
Motorola
Datasheet:
![MC1466L](/images/manufacturer_photos/0/4/459/motorola_tmb.jpg)
Part Number:
Description:
MC1466LMotorola, Inc [PRECISION WIDE RANGE VOLTAGE AND CURRENT REGULATOR]
Manufacturer:
Motorola
Datasheet:
![MC145532DW](/images/manufacturer_photos/0/4/459/motorola_tmb.jpg)
Part Number:
Description:
MC145532DWMotorola, Inc [ADPCM Transcoder]
Manufacturer:
Motorola
Datasheet:
![MCR704](/images/no-image3.png)
Part Number:
Description:
Silicon Controlled Rectifiers
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
![MRF21010](/images/no-image3.png)
Part Number:
Description:
RF Power Field Effect Transistors N-Channel Enhancement-Mode Lateral MOSFETs
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
![MRF21125S](/images/no-image3.png)
Part Number:
Description:
RF POWER FIELD EFFECT TRANSISTORS
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
![MRF282S](/images/no-image3.png)
Part Number:
Description:
LATERAL N-CHANNEL BROADBAND RF POWER MOSFETs
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
![MRF5P20180](/images/no-image3.png)
Part Number:
Description:
RF POWER FIELD EFFECT TRANSISTOR
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
![MRF8372R1](/images/no-image3.png)
Part Number:
Description:
RF LOW POWER TRANSISTOR NPN SILICON
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
![1SMA5921BT3](/images/no-image3.png)
Part Number:
Description:
PLASTIC SURFACE MOUNT ZENER DIODES 1.5 WATTS 3.3-68 VOLTS
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
![MR2835S](/images/no-image3.png)
Part Number:
Description:
OVERVOLTAGE TRANSIENT SUPPRESSOR
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
![MTD15N06](/images/no-image3.png)
Part Number:
Description:
TMOS POWER FET 15 AMPERES 60 VOLTS
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet: