P89LPC913 PHILIPS [NXP Semiconductors], P89LPC913 Datasheet - Page 12

• Manufacturer Part Number: P89LPC913
• Description: 8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
Table 5:
9397 750 14468
Product data
Symbol
P0.2,
P0.4 to P0.6
P1.0 to P1.2,
P1.5
P89LPC914 pin description
Pin
13
12
11
5
9
6
7
3
Type
I/O
I/O
I
I
I/O
I
I
I/O
I
I
I/O
O
I
I/O
(P1.0 to
P1.2);
I (P1.5)
I/O
O
I/O
I
I/O
I/O
I
I
Description
Port 0: Port 0 is a 4-bit I/O port with a user-configurable output type. During reset
Port 0 latches are configured in the input only mode with the internal pull-up
disabled. The operation of Port 0 pins as inputs and outputs depends upon the port
configuration selected. Each port pin is configured independently. Refer to
9.11.1 “Port configurations”
The Keypad Interrupt feature operates with Port 0 pins.
All pins have Schmitt triggered inputs.
Port 0 also provides various special functions as described below:
P0.2 — Port 0 bit 2.
CIN2A — Comparator 2 positive input A.
KBI2 — Keyboard input 2.
P0.4 — Port 0 bit 4.
CIN1A — Comparator 1 positive input A.
KBI4 — Keyboard input 4.
P0.5 — Port 0 bit 5.
CMPREF — Comparator reference (negative) input.
KBI5 — Keyboard input 5.
P0.6 — Port 0 bit 6.
CMP1 — Comparator 1 output.
KBI6 — Keyboard input 6.
Port 1: Port 1 is a 4-bit I/O port with a user-configurable output type, except for
three pins noted below. During reset Port 1 latches are configured in the input only
mode with the internal pull-up disabled. The operation of the configurable Port 1
pins as inputs and outputs depends upon the port configuration selected. Each of
the configurable port pins are programmed independently. Refer to
“Port configurations”
an open drain when used as an output. P1.5 is input only.
All pins have Schmitt triggered inputs.
Port 1 also provides various special functions as described below:
P1.0 — Port 1 bit 0.
TxD — Transmitter output for the serial port.
P1.1 — Port 1 bit 1.
RxD — Receiver input for the serial port.
P1.2 — Port 1 bit 2. (Open drain when used as an output.)
T0 — Timer/counter 0 external count input or overflow output. (Open drain when
used as outputs.)
P1.5 — Port 1 bit 5 (input only).
RST — External Reset input during Power-on or if selected via UCFG1. When
functioning as a reset input, a LOW on this pin resets the microcontroller, causing
I/O ports and peripherals to take on their default states, and the processor begins
execution at address 0. Also used during a power-on sequence to force In-System
Programming mode.
Rev. 03 — 17 December 2004
and
Table 13 “DC electrical characteristics”
8-bit microcontrollers with two-clock 80C51 core
and
Table 13 “DC electrical characteristics”
P89LPC912/913/914
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
for details. P1.2 is
Section 9.11.1
for details.
Section
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