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PC87393F Scheda tecnica(PDF) 79 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Il numero della parte PC87393F
Spiegazioni elettronici  100-Pin LPC SuperI/O Devices for Portable Applications
PDF  148 Pages
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Produttore elettronici  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87393F Scheda tecnica(HTML) 79 Page - National Semiconductor (TI)

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3.0 General-Purpose Input/Output (GPIO) Port (Continued)
79
www.national.com
3.4.6
GPIO Event Enable Register (GPEVEN)
Location:
Device specific
Type:
R/W
3.4.7
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 GPEVST 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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