P89LPC9211FDH datasheet(9/75 Pages) NXP

9 / 75 page

P89LPC92X1

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Product data sheet

Rev. 2 — 1 December 2010

9 of 75

NXP Semiconductors

P89LPC9201/9211/922A1/9241/

8-bit microcontroller with 8-bit ADC

6.2 Pin description

Table 3.

Pin description

Symbol

Type Description

TSSOP20,

DIP20

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 12 “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

1I/O

P0.0 — Port 0 bit 0.

CMP2 — Comparator 2 output

KBI0 — Keyboard input 0.

P0.1/CIN2B/

KBI1/AD10

I/O

P0.1 — Port 0 bit 1.

CIN2B — Comparator 2 positive input B.

KBI1 — Keyboard input 1.

AD10 — ADC1 channel 0 analog input. (P89LPC9241/9251)

P0.2/CIN2A/

KBI2/AD11

I/O

P0.2 — Port 0 bit 2.

CIN2A — Comparator 2 positive input A.

KBI2 — Keyboard input 2.

AD11 — ADC1 channel 1 analog input. (P89LPC9241/9251)

P0.3/CIN1B/

KBI3/AD12

I/O

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

CIN1B — Comparator 1 positive input B.

KBI3 — Keyboard input 3.

AD12 — ADC1 channel 2 analog input. (P89LPC9241/9251)

P0.4/CIN1A/

KBI4/DAC1/AD13

I/O

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

CIN1A — Comparator 1 positive input A.

KBI4 — Keyboard input 4.

DAC1 — Digital-to-analog converter output 1. (P89LPC9241/9251)

AD13 — ADC1 channel 3 analog input. (P89LPC9241/9251)

P0.5/CMPREF/

KBI5

I/O

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

CMPREF — Comparator reference (negative) input.

KBI5 — Keyboard input 5.

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