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P89LPC9331FDH 데이터시트(PDF) 44 Page - NXP Semiconductors

부품명 P89LPC9331FDH
상세설명  8-bit microcontroller with accelerated two-clock 80C51 core, 4 kB/8 kB/16 kB 3 V byte-erasable flash with 8-bit ADCs
PDF  93 Pages
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제조업체  NXP [NXP Semiconductors]
홈페이지  http://www.nxp.com
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P89LPC9331FDH 데이터시트(HTML) 44 Page - NXP Semiconductors

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P89LPC9331_9341_9351_9361_3
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 2 June 2009
44 of 93
NXP Semiconductors
P89LPC9331/9341/9351/9361
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
PCLK
⁄16.
7.22.9 CCU interrupts
There are seven interrupt sources on the CCU which share a common interrupt vector.
7.23 UART
The P89LPC9331/9341/9351/9361 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 P89LPC9331/9341/9351/9361 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 12. 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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