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P87LPC779FDH Scheda tecnica(PDF) 19 Page - NXP Semiconductors

Il numero della parte P87LPC779FDH
Spiegazioni elettronici  CMOS single-chip 8-bit 80C51 microcontroller with 128-byte data RAM, 8 kB OTP
PDF  74 Pages
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Produttore elettronici  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

P87LPC779FDH Scheda tecnica(HTML) 19 Page - NXP Semiconductors

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Philips Semiconductors
P87LPC779
CMOS single-chip 8-bit microcontroller
Product data
Rev. 02 — 03 May 2004
19 of 74
9397 750 13213
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
8.6.2
Internal reference voltage
An internal reference voltage generator may supply a default reference when a single
comparator input pin is used. The value of the internal reference voltage, referred to
as Vref, is 1.28 V
±10 %.
Fig 7.
Comparator input and output connections.
Comparator 1
CP1
CN1
(P0.4) CIN1A
(P0.3) CIN1B
(P0.5) CMPREF
VREF
OE1
Change Detect
CO1
CMF1
Interrupt
Change Detect
CMF2
Interrupt
002aaa617
CMP1 (P0.6)
Comparator 2
OE2
CO2
CMP2 (P0.0)
CP2
CN2
(P0.2) CIN2A
(P0.1) CIN2B
a.
CPn, CNn, OEn=000
b.
CPn, CNn, OEn=001
c.
CPn, CNn, OEn=010
d.
CPn, CNn, OEn=011
e.
CPn, CNn, OEn=100
f.
CPn, CNn, OEn=101
g.
CPn, CNn, OEn=110
h.
CPn, CNn, OEn=111
Fig 8.
Comparator configurations.
CINnA
CMPREF
002aaa618
COn
CINnA
CMPREF
002aaa620
COn
CMPn
CINnA
VREF (1.23V)
002aaa621
COn
CINnA
VREF (1.23 V)
002aaa622
COn
CMPn
CINnB
CMPREF
002aaa623
COn
CINnB
CMPREF
002aaa624
COn
CMPn
CINnB
VREF (1.23V)
002aaa625
COn
CINnB
VREF (1.23 V)
002aaa626
COn
CMPn



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