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參數(shù)資料
| 型號： | PS2000ACQ |
| 英文描述： | A Network Communication Controller Designed to Connect Any MCU Application System To A Gateway(單片網(wǎng)絡(luò)通信控制器,用于控制MCU和網(wǎng)絡(luò)服務(wù)器之間的信息交換) |
| 中文描述： | 通信控制器的網(wǎng)絡(luò)連接任何設(shè)計單片機應(yīng)用系統(tǒng)到一個網(wǎng)關(guān)（單片網(wǎng)絡(luò)通信控制器，用于控制微控制器和網(wǎng)絡(luò)服務(wù)器之間的信息交換） |
| 文件頁數(shù)： | 24/54頁 |
| 文件大小： | 594K |
| 代理商： | PS2000ACQ |
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PS2000A Datasheet
Doc. Number:
TECINHD001
Version 1.0
3/1/2002
P&S DataCom Corporation
20
9.4
Timing
Whether the SPI or I
2
C communication mode is used, the communication between the
PS2000A and the MCU is comprised of two processes:
1. The PS2000A sends data to the MCU;
2. The PS2000A receives data from the MCU.
The process is shown as in Figure 13.
PS2000A sends data to MCU
PS2000A receives data from MCU
/INT
Figure 13 One Communication Process between PS2000A and MCU
9.4.1
SPI Mode Timing
In SPI mode, the communication between PS2000A and the MCU conforms to the
following rules:
1.
First, the PS2000A sends an /INT signal to request a data exchange with the MCU,
the following communication transaction will be controlled by the MCU, that is, the
MCU sends chip select signal /CS and clock signal CLK.
2.
Data will be transferred in byte form. The MSB is transferred first until the LSB is
received.
3.
Data is sampled on the falling edge of CLK and shifted on the rising edge.
4.
In idle state, CLK is in high level.
The timing of the PS2000A sending data to the MCU is shown in Figure 14.
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