參數(shù)資料
型號(hào): P89LPC938FA
廠商: NXP SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: 8-bit microcontroller with accelerated two-clock 80C51 core 8 kB 3 V byte-erasable Flash with 10-bit A/D converter
中文描述: 8-BIT, FLASH, 18 MHz, MICROCONTROLLER, PQCC28
封裝: PLASTIC, MS-018, SOT-261-2, LCC-28
文件頁(yè)數(shù): 35/68頁(yè)
文件大?。?/td> 318K
代理商: P89LPC938FA
9397 750 14051
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 01 — 25 February 2005
35 of 68
Philips Semiconductors
P89LPC938
8-bit microcontroller with 10-bit A/D converter
7.21 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:
Bi-directional data transfer between masters and slaves
Multi master 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 13
. The P89LPC938 device provides a
byte-oriented I
2
C-bus interface that supports data transfers up to 400 kHz.
Fig 13. I
2
C-bus configuration.
OTHER DEVICE
WITH I
2
C-BUS
INTERFACE
SDA
SCL
R
P
R
P
OTHER DEVICE
WITH I
2
C-BUS
INTERFACE
P1.3/SDA
P1.2/SCL
P89LPC938
I
2
C-bus
002aab105
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