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P89LPC930FDH 데이터시트(PDF) 30 Page - NXP Semiconductors

부품명 P89LPC930FDH
상세설명  8-bit microcontrollers with two-clock 80C51 core 4 kB/8 kB 3 V Flash with 256-byte data RAM
PDF  55 Pages
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제조업체  PHILIPS [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

P89LPC930FDH 데이터시트(HTML) 30 Page - NXP Semiconductors

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Philips Semiconductors
P89LPC930/931
8-bit microcontrollers with two-clock 80C51 core
Product data
Rev. 05 — 15 December 2004
30 of 55
9397 750 14472
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
8.18 I2C-bus serial interface
I2C-bus uses two wires (SDA and SCL) to transfer information between devices
connected to the bus, and it has the following features:
• Bidirectional data transfer between masters and slaves.
• Multimaster bus (no central master).
• Arbitration between simultaneously transmitting masters without corruption of
serial data on the bus.
• Serial clock synchronization allows devices with different bit rates to communicate
via one serial bus.
• Serial clock synchronization can be used as a handshake mechanism to suspend
and resume serial transfer.
• The I2C-bus may be used for test and diagnostic purposes.
A typical I2C-bus configuration is shown in Figure 7. The P89LPC930/931 device
provides a byte-oriented I2C-bus interface that supports data transfers up to 400 kHz.
Fig 7.
I2C-bus configuration.
OTHER DEVICE
WITH I2C-BUS
INTERFACE
SDA
SCL
RP
RP
OTHER DEVICE
WITH I2C-BUS
INTERFACE
P1.3/SDA
P1.2/SCL
P89LPC930/931
I2C-BUS
002aaa433



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