P89LPC924_925 NXP Semiconductors, P89LPC924_925 Datasheet - Page 23
P89LPC924_925
Manufacturer Part Number
P89LPC924_925
Description
The P89LPC924/925 are single-chip microcontrollers designed for applicationsdemanding high-integration, low cost solutions over a wide range of performancerequirements
Manufacturer
NXP Semiconductors
Datasheet
1.P89LPC924_925.pdf
(49 pages)
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Philips Semiconductors
9397 750 14471
Product data
Fig 6. Interrupt sources, interrupt enables, and power-down wake-up sources.
(RTCCON.1)
WDOVF
RTCF
ERTC
ENADCI1
ADCI1
BNDI1
ENBI1
8.13 I/O ports
EAD
The P89LPC924/925 has three I/O ports: Port 0, Port 1, and Port 3. Ports 0 and 1 are
8-bit ports, and Port 3 is a 2-bit port. The exact number of I/O pins available depend
upon the clock and reset options chosen, as shown in
Table 6:
[1]
Clock source
On-chip oscillator or
watchdog oscillator
External clock input
Low/medium/high speed
oscillator (external
crystal or resonator)
Required for operation above 12 MHz.
EA (IE0.7)
TI & RI/RI
EWDRT
ES/ESR
CMF2
CMF1
KBIF
EKBI
EI2C
BOF
EBO
EX0
EX1
EST
TF0
ET0
TF1
ET1
IE0
IE1
EC
Number of I/O pins available
SI
TI
Rev. 03 — 15 December 2004
8-bit microcontrollers with accelerated two-clock 80C51 core
Reset option
No external reset (except during power-up) 18
External RST pin supported
No external reset (except during power-up) 17
External RST pin supported
No external reset (except during power-up) 16
External RST pin supported
[1]
[1]
[1]
P89LPC924/925
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Table
6.
INTERRUPT
TO CPU
WAKE-UP
(IF IN POWER-DOWN)
Number of I/O pins
(20-pin package)
17
16
15
002aaa792
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