P89LPC934 PHILIPS [NXP Semiconductors], P89LPC934 Datasheet - Page 10

• Manufacturer Part Number: P89LPC934
• Description: 8-bit microcontroller with accelerated two-clock 80C51 core 4 kB/8 kB 3 V byte-erasable Flash with 8-bit A/D converters
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
Table 4:
[1]
9397 750 15113
Product data sheet
Symbol
P3.0 to P3.1
P3.0/XTAL2/
CLKOUT
P3.1/XTAL
V
V
SS
DD
Input/output for P1.0 to P1.4, P1.6, P1.7. Input for P1.5.
Pin description
Pin
TSSOP28,
PLCC28
9
8
7
21
HVQFN28
5
4
3
17
…continued
Type
I/O
I/O
O
O
I/O
I
I
I
Description
Port 3: Port 3 is a 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
and
All pins have Schmitt trigger 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 RTC/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 RTC/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. 06 — 20 June 2005
8-bit microcontroller with accelerated two-clock 80C51 core
Table 11 “Static characteristics”
P89LPC933/934/935/936
Section 8.13.1 “Port configurations”
for details.
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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