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P89LPC9321 데이터시트(PDF) 35 Page - NXP Semiconductors

부품명 P89LPC9321
상세설명  8-bit microcontroller with accelerated two-clock 80C51 core 8 kB 3 V byte-erasable flash with 512-byte data EEPROM
PDF  70 Pages
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제조업체  NXP [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo NXP - NXP Semiconductors

P89LPC9321 데이터시트(HTML) 35 Page - NXP Semiconductors

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P89LPC9321_1
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 01 — 9 December 2008
35 of 70
NXP Semiconductors
P89LPC9321
8-bit microcontroller with accelerated two-clock 80C51 core
Since N ranges from 0 to 15, the CCLK frequency can be in the range of PCLK to
PCLK16.
7.22.9 CCU interrupts
There are seven interrupt sources on the CCU which share a common interrupt vector.
7.23 UART
The P89LPC9321 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
P89LPC9321 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.
7.23.1 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
002aaa896
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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