P89LPC920FDH PHILIPS [NXP Semiconductors], P89LPC920FDH Datasheet - Page 8

• Manufacturer Part Number: P89LPC920FDH
• Description: 8-bit microcontrollers with two-clock 80C51 core 2 kB/4 kB/8 kB 3 V low-power Flash with 256-byte data RAM
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
Table 3:
[1]
6. Logic symbol
9397 750 12285
Product data
Symbol
P3.0 - P3.1
V
V
Fig 4. Logic symbol.
SS
DD
Input/Output for P1.0-P1.4, P1.6, P1.7. Input for P1.5.
Pin description
Pin
7, 6
7
6
5
15
CLKOUT
KBI0
KBI1
KBI2
KBI3
KBI4
KBI5
KBI6
KBI7
Type
I/O
I/O
O
O
I/O
I
I
I
…continued
CMPREF
CIN2B
CIN2A
CIN1B
CIN1A
XTAL2
XTAL1
CMP2
CMP1
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
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.
T1
Rev. 06 — 21 November 2003
and
Table 8 “DC electrical characteristics”
V DD
002aaa409
V SS
8-bit microcontrollers with two-clock 80C51 core
P89LPC920/921/922
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
TxD
RxD
T0
INT0
INT1
RST
for details.
Section 8.12.1 “Port
SCL
SDA
8 of 45