P89LPC932 datasheet(30/60 Pages) PHILIPS

30 / 60 page

Philips Semiconductors

P89LPC932

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

Product data

Rev. 04 — 06 January 2004

30 of 60

9397 750 12379

8.18.9

CCU interrupts

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

vector.

8.19 UART

The P89LPC932 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 P89LPC932 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 4 modes: shift register, 8-bit UART, 9-bit

UART, and CPU clock/32 or CPU clock/16.

8.19.1

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.

Fig 11. Capture/Compare Unit interrupts.

002aaa537

INTERRUPT

TO CPU

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)

EA (IEN0.7)

ECCU (IEN1.4)

PRIORITY

ENCODER

OTHER

INTERRUPT

SOURCES

ENCINT.0

ENCINT.1

ENCINT.2

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