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參數資料
型號: P89LPC920
廠商: NXP Semiconductors N.V.
英文描述: 8-bit microcontrollers with two-clock 80C51 core 2 kB/4 kB/8 kB 3 V low-power Flash with 256-byte data RAM
中文描述: 8位微控制器兩個小時80C51的核心2鍵盤/ 4 KB的/ 8 KB的3伏的低功耗Flash 256 - RAM的字節數據
文件頁數: 26/45頁
文件大小: 877K
代理商: P89LPC920
Philips Semiconductors
P89LPC920/921/922
8-bit microcontrollers with two-clock 80C51 core
Product data
Rev. 06 — 21 November 2003
26 of 45
9397 750 12285
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
8.19 I
2
C-bus serial interface
I
2
C-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 I
2
C-bus may be used for test and diagnostic purposes.
A typical I
2
C-bus configuration is shown in
Figure 8
. The P89LPC920/921/922 device
provides a byte-oriented I
2
C-bus interface that supports data transfers up to 400 kHz.
Fig 8.
I
2
C-bus configuration.
OTHER DEVICE
WITH I
2
C-BUS
INTERFACE
SDA
SCL
RP
RP
OTHER DEVICE
WITH I
2
C-BUS
INTERFACE
P1.3/SDA
P1.2/SCL
P89LPC920/921/922
I
2
C-BUS
002aaa420
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P89LPC9201FDH 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontroller with accelerated two-clock 80C51 core 2 kB/4 kB/8 kB 3 V byte-erasable flash with 8-bit ADC
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