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MC81F4204M Datasheet(PDF) 84 Page - Finechips

Part No. MC81F4204M
Description  ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS
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Manufacturer  FINECHIPS [Finechips]
Direct Link  http://www.finechips.com
Logo FINECHIPS - Finechips

MC81F4204M Datasheet(HTML) 84 Page - Finechips

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MC81F4204
84
October 19, 2009 Ver.1.35
ERQ0
– EXT 10,11,0~5 / R00~R07
R0 PORT EXTERNAL INTERRUPT REQUEST REGISTER
00CCH
When an interrupt is generated, the bit of ERQ0 that generated it is cleared by the hardware when the
service routine is vectored to only if the interrupt was transition-activated.
7
6
5
4
3
2
1
0
ERQ0
EXT5IR
EXT4IR
EXT3IR
EXT2IR
EXT1IR
EXT0IR EXT11IR EXT10IR
Reset value: 00H
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
EXT5IR
R07/EXT5 External Interrupt Request Flag
0: Interrupt request flag is not
pending, request flag bit clear
1: Interrupt request flag is pending
EXT4IR
R06/EXT4 External Interrupt Request Flag
EXT3IR
R05/EXT3 External Interrupt Request Flag
EXT2IR
R04/EXT2 External Interrupt Request Flag
EXT1IR
R03/EXT1 External Interrupt Request Flag
EXT0IR
R02/EXT0 External Interrupt Request Flag
EXT11IR
R01/EXT11 External Interrupt Request Flag
EXT10IR
R00/EXT10 External Interrupt Request Flag
ERQ1
– EXT 6~9 / R10~R13
R1 PORT EXTERNAL INTERRUPT REQUEST REGISTER
00D8H
When an interrupt is generated, the bit of ERQ1 that generated it is cleared by the hardware when the
service routine is vectored to only if the interrupt was transition-activated.
7
6
5
4
3
2
1
0
ERQ1
EXT9IR EXT8IR EXT7IR EXT6IR
Reset value: 00H
R/W
R/W
R/W
R/W
bit7
– bit4
Not used for MC81F4204
EXT9IR
R03/EXT9 External Interrupt Request Flag
0: Interrupt request flag is not pending,
request flag bit clear
1: Interrupt request flag is pending
EXT8IR
R02/EXT8 External Interrupt Request Flag
EXT7IR
R01/EXT7 External Interrupt Request Flag
EXT6IR
R00/EXT6 External Interrupt Request Flag


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