P89LPC985 datasheet(10/85 Pages) NXP

10 / 85 page

P89LPC980_982_983_985_2

Preliminary data sheet

Rev. 02 — 8 February 2010

10 of 85

NXP Semiconductors

P89LPC980/982/983/985

8-bit microcontroller with accelerated two-clock 80C51 core

6.2 Pin description

Table 3.

Pin description

Symbol

Type

Description

PLCC28,

TSSOP28

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

7.16.1 “Port configurations” and Table 13 “Static characteristics” for details.

The Keypad Interrupt feature operates with Port 0 pins.

All pins have Schmitt trigger inputs.

Port 0 also provides various special functions as described below:

P0.0/CMP2/KBI0/

AD05/SPICLK

3I/O

P0.0 — Port 0 bit 0.

CMP2 — Comparator 2 output

KBI0 — Keyboard input 0.

AD05 — ADC0 channel 5 analog input. (P89LPC985)

I/O

SPICLK — SPI clock. When configured as master, this pin is output; when

configured as slave, this pin is input. (pin remap)

P0.1/CIN2B/

KBI1/AD00

I/O

P0.1 — Port 0 bit 1.

CIN2B — Comparator 2 positive input B.

KBI1 — Keyboard input 1.

AD00 — ADC0 channel 0 analog input. (P89LPC983/985)

P0.2/CIN2A/

KBI2/AD01

I/O

P0.2 — Port 0 bit 2.

CIN2A — Comparator 2 positive input A.

KBI2 — Keyboard input 2.

AD01 — ADC0 channel 1 analog input. (P89LPC983/985)

P0.3/CIN1B/

KBI3/AD02/T2

I/O

P0.3 — Port 0 bit 3. High current source.

CIN1B — Comparator 1 positive input B.

KBI3 — Keyboard input 3.

AD02 — ADC0 channel 2 analog input. (P89LPC983/985)

I/O

T2 — Timer/counter 2 external count input or overflow output.

P0.4/CIN1A/

KBI4/AD03

I/O

P0.4 — Port 0 bit 4. High current source.

CIN1A — Comparator 1 positive input A.

KBI4 — Keyboard input 4.

AD03 — ADC0 channel 3 analog input. (P89LPC983/985)

P0.5/CMPREF/

KBI5/T3

I/O

P0.5 — Port 0 bit 5. High current source.

CMPREF — Comparator reference (negative) input.

KBI5 — Keyboard input 5.

I/O

T3 — Timer/counter 3 external count input or overflow output.

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