P89LPC930_931 NXP Semiconductors, P89LPC930_931 Datasheet - Page 21

• Manufacturer Part Number: P89LPC930_931
• Description: The P89LPC930/931 are single-chip microcontrollers designed for applicationsdemanding high-integration, low cost solutions over a wide range of performancerequirements
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 14472
Product data
Fig 5. Interrupt sources, interrupt enables, and power-down wake-up sources.
(RTCCON.1)
WDOVF
ERTC
RTCF
8.11 I/O ports
The P89LPC930/931 has four I/O ports: Port 0, Port 1, Port 2, and Port 3. Ports 0, 1
and 2 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 5:
[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
ES/ESR
EWDRT
CMF2
CMF1
EKBI
ESPI
KBIF
EI2C
SPIF
EBO
BOF
EST
EX0
EX1
ET0
ET1
TF0
TF1
IE0
IE1
EC
TI
SI
Number of I/O pins available
Rev. 05 — 15 December 2004
Reset option
No external reset (except during power-up)
External RST pin supported
No external reset (except during power-up)
External RST pin supported
No external reset (except during power-up)
External RST pin supported
8-bit microcontrollers with two-clock 80C51 core
[1]
[1]
[1]
P89LPC930/931
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
002aaa432
INTERRUPT
TO CPU
WAKE-UP
(IF IN POWER-DOWN)
Table
Number of I/O pins
(20-pin package)
26
25
25
24
24
23
5.
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