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| 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)絡通信控制器,用于控制MCU和網(wǎng)絡服務器之間的信息交換) |
| 中文描述： | 通信控制器的網(wǎng)絡連接任何設計單片機應用系統(tǒng)到一個網(wǎng)關(guān)（單片網(wǎng)絡通信控制器，用于控制微控制器和網(wǎng)絡服務器之間的信息交換） |
| 文件頁數(shù)： | 20/54頁 |
| 文件大?。?/td> | 594K |
| 代理商： | PS2000ACQ |
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PS2000A Datasheet
Doc. Number:
TECINHD001
Version 1.0
3/1/2002
P&S DataCom Corporation
16
9 Communication between the PS2000A and the MCU
The communication between the PS2000A and the MCU is based on the MCUnet
TM
1.0
protocol. The communication network which is established by the MCUnet
TM
1.0 protocol is a
master-slave mode. In the process of communication, the PS2000A is in master mode and the
MCU is in slave mode.
An integrated process of communication between the PS2000A and the MCU should include
two parts: the PS2000A sends commands and data to the MCU application system and the
MCU responds to the PS2000A.
9.1
Data Packet Structure
Based on section 2.3 of the MCUnet
TM
1.0 protocol, the structure of the communication
data packet between the PS2000A and the MCU is shown as Table 12.
Table 12
Length of Data
Packet
Command
(Cmd)
Command
Control Signal
Main Parameter
(Param)
Data (Data)
(One byte)
(One byte)
(One byte)
(Two bytes)
(n bytes)
It is defined by the PS2000A that the transceiver buffer must be not less than 16 bytes or
greater than 69 bytes. The PS2000A adjusts the length of the data packet according to the
size of the MCU transceiver buffer. Because of the structure of the data packet, the first
four items (length of data packet, command, command control signal and main parameter)
are fixed in their byte count; the PS2000A only can adjust the length of the data packet
by its data area.
The data packet which is sent from the PS2000A to the MCU application system has the
same structure as the packet that the MCU sends to the PS2000A.
After the PS2000A sends out the signal of requesting communication, the MCU
application system should accomplish the whole data communication with the PS2000A
within 500ms. Otherwise the current communication will fault with an overtime error.
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