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ST7FLCD1 Datenblatt(PDF) 25 Page - STMicroelectronics

Teilenummer ST7FLCD1
Bauteilbeschribung  8-bit MCU for LCD Monitors with 60 KBytes Flash,2 KBytes RAM, 2 DDC Ports and Infrared Controller
PDF  95 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
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ST7FLCD1 Datenblatt(HTML) 25 Page - STMicroelectronics

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ST7FLCD1
Interrupts
The general sequence for clearing an interrupt is an access to the status register when the flag is
set followed by a read or write of the associated register. Note that the clearing sequence resets the
internal latch. A pending interrupt (i.e. waiting to be enabled) will therefore be lost if the Clear
sequence is executed.
Figure 10: Interrupt Processing Flowchart
From Reset
Execute Instruction
Restore PC, X, A, CC from Stack
Interrupt?
N
Y
I Bit set?
N
Y
Fetch Next Instruction
Y
N
This clears I bit by default
N
Y
IRET?
Stack PC, X, A, CC
Set I Bit
Load PC from Interrupt Vector
TRAP?



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