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PC87366 Datasheet(PDF) 137 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No. de pieza PC87366
Descripción Electrónicos  128-Pin LPC SuperI/O with System Hardware Monitoring, MIDI and Game Ports
PDF  240 Pages
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Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87366 Datasheet(HTML) 137 Page - National Semiconductor (TI)

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6.0 General-Purpose Input/Output (GPIO) Port (Continued)
137
www.national.com
6.4.6
GPIO Event Enable Register (GPEVEN)
Location:
Device specific
Type:
R/W
6.4.7
GPIO Event Status Register (GPEVST)
Location:
Device specific
Type:
R/W1C
Bit
76543210
Name
Event Enable
Reset
00000000
Bit
Description
7
Event Enable. Bits 7-0 correspond to pins 7-0 respectively. Each bit enables system notification triggering by
the corresponding GPIO pin. The bit has no effect on the corresponding Status bit in the GPST register.
0: IRQ generation by corresponding GPIO pin masked
1: IRQ generation by corresponding GPIO pin enabled
6
5
4
3
2
1
0
Bit
76543210
Name
Status
Reset
00000000
Bit
Description
7
Status. Bits 7-0 correspond to pins 7-0 respectively. Each bit is an edge detector that is set to 1 by the hardware
upon detection of an active edge (i.e. edge that matches the IRQ Polarity bit) on the corresponding GPIO pin.
This edge detection is independent of the Event Type or the Event Enable bit in the GPEVEN register. However,
the bit may reflect the event status for enabled, edge-trigger event sources. Writing 1 to the Status bit clears it
to 0.
0: No active edge detected since last cleared
1: Active edge detected
6
5
4
3
2
1
0



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