P89LPC924 Philips Semiconductors, P89LPC924 Datasheet - Page 8

• Manufacturer Part Number: P89LPC924
• Description: (P89LPC924 / P89LPC925) 8-bit microcontrollers
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Table 3:
[1]
6. Logic symbol
9397 750 14471
Product data
Symbol
P3.0 - P3.1
V
V
Fig 3. 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
DAC1
Type
I/O
I/O
O
O
I/O
I
I
I
AD10
AD11
AD12
AD13
…continued
CLKOUT
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.
KBI0
KBI1
KBI2
KBI3
KBI4
KBI5
KBI6
KBI7
CMPREF
Rev. 03 — 15 December 2004
CIN2B
CIN2A
CIN1B
CIN1A
XTAL2
XTAL1
CMP2
CMP1
and
T1
8-bit microcontrollers with accelerated two-clock 80C51 core
Table 8 “DC electrical characteristics”
V DD
V SS
002aaa789
P89LPC924/925
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
TxD
RxD
T0
INT0
INT1
RST
for details.
Section 8.13.1 “Port
SCL
SDA
8 of 49