XC68HC08KH12 Motorola, XC68HC08KH12 Datasheet - Page 215

• Manufacturer Part Number: XC68HC08KH12
• Description: MICROCONTROLLER
• Manufacturer: Motorola

14.4.1 IRQ1/V
MC68HC(7)08KH12
MOTOROLA
$001E
Addr.
IRQ1/V
IRQ Status/Control Register
PP
DECODER
VECTOR
V
RESET
FETCH
ACK1
DD
PP
I
PULLUP
DEVICE
NTERNAL
Register Name
—
Pin
Rev. 1.0
(ISCR)
A logic zero on the IRQ1/V
IRQ1 latch. A vector fetch, software clear, or reset clears the IRQ1 latch.
If the MODE1 bit is set, the IRQ1/V
and low-level-sensitive. With MODE1 set, both of the following actions
must occur to clear IRQ1:
Table 14-1. IRQ I/O Port Register Summary
V
MODE1
DD
Reset:
Read:
Write:
D
CK
IRQ1
CLR
FF
Q
Bit 7
External Interrupt (IRQ)
Figure 14-1. IRQ Module Block Diagram
0
0
= Unimplemented
6
0
0
PP
IMASK1
pin can latch an interrupt request into the
5
0
0
SYNCHRO-
VOLTAGE
DETECT
NIZER
HIGH
PP
4
0
0
pin is both falling-edge-sensitive
IRQF1
3
0
IRQF1
ACK1
External Interrupt (IRQ)
2
0
0
Functional Description
Advance Information
IMASK1 MODE1
1
0
TO CPU FOR
BIL/BIH
INSTRUCTIONS
IRQ1
INTERRUPT
REQUEST
TO MODE
SELECT
LOGIC
Bit 0
0
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