P89LPC930_931 NXP Semiconductors, P89LPC930_931 Datasheet - Page 9
P89LPC930_931
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
Datasheet
1.P89LPC930_931.pdf
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Philips Semiconductors
Table 3:
[1]
9397 750 14472
Product data
Symbol
P3.0 - P3.1
V
V
SS
DD
Input/Output for P1.0-P1.4, P1.6, P1.7. Input for P1.5.
Pin description
Pin
9, 8
9
8
7
21
…continued
Type
I/O
I/O
O
O
I/O
I
I
I
Description
Port 3: Port 3 is an 2-bit I/O port with a user-configurable output type. During reset
Port 3 latches are configured in the input only mode with the internal pull-up disabled.
The operation of Port 3 pins as inputs and outputs depends upon the port
configuration selected. Each port pin is configured independently. Refer to
8.11.1 “Port configurations”
All pins have Schmitt triggered inputs.
Port 3 also provides various special functions as described below:
P3.0 — Port 3 bit 0.
XTAL2 — Output from the oscillator amplifier (when a crystal oscillator option is
selected via the FLASH configuration).
CLKOUT — CPU clock divided by 2 when enabled via SFR bit (ENCLK - TRIM.6). It
can be used if the CPU clock is the internal RC oscillator, Watchdog oscillator or
external clock input, except when XTAL1/XTAL2 are used to generate clock source
for the real time clock/system timer.
P3.1 — Port 3 bit 1.
XTAL1 — Input to the oscillator circuit and internal clock generator circuits (when
selected via the FLASH configuration). It can be a port pin if internal RC oscillator or
Watchdog oscillator is used as the CPU clock source, and if XTAL1/XTAL2 are not
used to generate the clock for the real time clock/system timer.
Ground: 0 V reference.
Power Supply: This is the power supply voltage for normal operation as well as Idle
and Power Down modes.
Rev. 05 — 15 December 2004
8-bit microcontrollers with two-clock 80C51 core
and
Table 7 “DC electrical characteristics”
P89LPC930/931
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
for details.
Section
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