P89LPC952_954_4 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 04 — 24 July 2008 9 of 69
NXP Semiconductors
P89LPC952/954
8-bit microcontroller with 10-bit ADC
6.2 Pin description
Table 3. Pin description
Symbol Pin Type Description
LQFP48 PLCC44 LQFP44
P0.0 to P0.7 I/O Port 0: Port 0 is an 8-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
Section 7.13.1 “Port configurations”
and
Table 11 “Static characteristics” for details.
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:
P0.0/CMP2/
KBI0/AD05
40 43 37 I/O P0.0 — Port 0 bit 0.
O CMP2 — Comparator 2 output.
I KBI0 — Keyboard input 0.
I AD05 — ADC0 channel 5 analog input.
P0.1/CIN2B/
KBI1/AD00
39 42 36 I/O P0.1 — Port 0 bit 1.
I CIN2B — Comparator 2 positive input B.
I KBI1 — Keyboard input 1.
I AD00 — ADC0 channel 0 analog input.
P0.2/CIN2A/
KBI2/AD01
38 41 35 I/O P0.2 — Port 0 bit 2.
I CIN2A — Comparator 2 positive input A.
I KBI2 — Keyboard input 2.
I AD01 — ADC0 channel 1 analog input.
P0.3/CIN1B/
KBI3/AD02
37 40 34 I/O P0.3 — Port 0 bit 3.
I CIN1B — Comparator 1 positive input B.
I KBI3 — Keyboard input 3.
I AD02 — ADC0 channel 2 analog input.
P0.4/CIN1A/
KBI4/AD03
36 39 33 I/O P0.4 — Port 0 bit 4.
I CIN1A — Comparator 1 positive input A.
I KBI4 — Keyboard input 4.
I AD03 — ADC0 channel 3 analog input.
P0.5/CMPREF/
KBI5
35 38 32 I/O P0.5 — Port 0 bit 5.
I CMPREF — Comparator reference (negative) input.
I KBI5 — Keyboard input 5.
