P89LPC932A1 View Datasheet(PDF) - Philips Electronics

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

Philips Electronics 

Philips Semiconductors

P89LPC932A1

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

7.19.9 CCU interrupts

There are seven interrupt sources on the CCU which share a common interrupt vector.

EA (IEN0.7)

ECCU (IEN1.4)

TOIE2 (TICR2.7)

TOIF2 (TIFR2.7)

TICIE2A (TICR2.0)

TICF2A (TIFR2.0)

TICIE2B (TICR2.1)

TICF2B (TIFR2.1)

TOCIE2A (TICR2.3)

TOCF2A (TIFR2.3)

TOCIE2B (TICR2.4)

TOCF2B (TIFR2.4)

TOCIE2C (TICR2.5)

TOCF2C (TIFR2.5)

TOCIE2D (TICR2.6)

TOCF2D (TIFR2.6)

other

interrupt

sources

PRIORITY

ENCODER

interrupt to

CPU

ENCINT.0

ENCINT.1

ENCINT.2

Fig 11. Capture/compare unit interrupts.

002aaa896

7.20 UART

The P89LPC932A1 has an enhanced UART that is compatible with the conventional

80C51 UART except that Timer 2 overflow cannot be used as a baud rate source. The

P89LPC932A1 does include an independent Baud Rate Generator. The baud rate can be

selected from the oscillator (divided by a constant), Timer 1 overflow, or the independent

Baud Rate Generator. In addition to the baud rate generation, enhancements over the

standard 80C51 UART include Framing Error detection, automatic address recognition,

selectable double buffering and several interrupt options. The UART can be operated in

four modes: shift register, 8-bit UART, 9-bit UART, and CPU clock/32 or CPU clock/16.

7.20.1 Mode 0

Serial data enters and exits through RXD. TXD outputs the shift clock. 8 bits are

transmitted or received, LSB first. The baud rate is fixed at 1⁄16 of the CPU clock

frequency.

7.20.2 Mode 1

10 bits are transmitted (through TXD) or received (through RXD): a start bit (logic 0),

8 data bits (LSB first), and a stop bit (logic 1). When data is received, the stop bit is stored

in RB8 in Special Function Register SCON. The baud rate is variable and is determined

by the Timer 1 overflow rate or the Baud Rate Generator (described in Section 7.20.5

“Baud rate generator and selection”).

9397 750 14871

Product data sheet

Rev. 02 — 10 May 2005

© Koninklijke Philips Electronics N.V. 2005. All rights reserved.

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