P89LPC932A1 View Datasheet(PDF) - NXP Semiconductors.

Part Name

Description

Manufacturer

P89LPC932A1

8-bit microcontroller with accelerated two-clock 80C51 core 8 kB 3 V byte-erasable flash with 512-byte data EEPROM

NXP Semiconductors. 

NXP Semiconductors

P89LPC932A1

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

Table 2. Pin description …continued

Symbol

Pin

Type Description

TSSOP28, HVQFN28

PLCC28,

DIP28

P2.7/ICA

28

24

I/O P2.7 — Port 2 bit 7.

I

ICA — Input Capture A.

P3.0 to P3.1

I/O Port 3: Port 3 is a 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 Section 7.13.1 “Port configurations”

and Table 8 “Static characteristics” for details.

All pins have Schmitt trigger inputs.

Port 3 also provides various special functions as described below:

P3.0/XTAL2/ 9

5

I/O P3.0 — Port 3 bit 0.

CLKOUT

O XTAL2 — Output from the oscillator amplifier (when a crystal oscillator

option is selected via the flash configuration.

O 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 RTC/system timer.

P3.1/XTAL1 8

4

I/O P3.1 — Port 3 bit 1.

I

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 RTC/system

timer.

VSS

7

3

I

Ground: 0 V reference.

VDD

21

17

I

Power supply: This is the power supply voltage for normal operation as

well as Idle and Power-down modes.

[1] Input/Output for P1.0 to P1.4, P1.6, P1.7. Input for P1.5.

P89LPC932A1_3

Product data sheet

Rev. 03 — 12 March 2007

© NXP B.V. 2007. All rights reserved.

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