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參數(shù)資料
| 型號： | UPD6708 |
| 廠商： | NEC Corp. |
| 英文描述： | IEBusa Inter Equipment Busa PROTOCOL CONTROL LSI |
| 中文描述： | IEBusa設(shè)備布薩間協(xié)議控制大規(guī)模集成電路 |
| 文件頁數(shù)： | 33/72頁 |
| 文件大?。?/td> | 292K |
| 代理商： | UPD6708 |
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33
μ
PD6708
5.2.3
MREQ1 command (command code: 0010)
(1)
Functions
This command executes a master communication (transmission or reception). After execution of the command, the unit
begins communication as the master unit. As long as it does not lose in arbitration, the master unit will communicate with
the slave unit which has the slave address specified by SETSA command.
<1>
Selected broadcast communication or ordinary communication
Broadcast communication selection
Ordinary communication selection
<2>
Sets the control bits (4 bits)
<3>
Sets the number of transmit data bytes (8 bits) (transmission only)
: 0H
: 8H
(broadcast bit ‘0’ output)
(broadcast bit ‘1’ output)
Table 5-6. Number of Transmit Data Bytes Setting
Number of Transmit Data Bytes
Command Parameter
1 byte
1H
2 bytes
2H
:
:
:
:
255 bytes
FFH
256 bytes
00H
<4>
Sets the transmit data (transmission only)
(2)
Example
When the MREQ1 command is used to select ‘ordinary communication’, set the control bit to ‘AH’ (command write and
lock), the number of transmit data bytes to 4, and the transmit data to 12H, 34H, 56H, and 78H, the contents of WDB and
CMR are shown below.
Caution Transmit data 56H and 78H should be set when the above command parameters have been read and WDB
is empty.
1000
1010
0000
0100
0100
0010
First Byte
Second Byte
Broadcast
Bits
Number of Transmit
Data Bytes
Third Byte
Fourth Byte
WDB
CMR
Control
Bits
First
Data Byte
Second
Data Byte
0011
0010
0001
0100
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UPD6708CX | IEBusa Inter Equipment Busa PROTOCOL CONTROL LSI |
| UPD6708GS | IEBusa Inter Equipment Busa PROTOCOL CONTROL LSI |
| UPD6951 | 6 BIT D/A CONVERTER FOR VIDEO SIGNAL PROCESSING CMOS LSI |
| UPD6951C | 6 BIT D/A CONVERTER FOR VIDEO SIGNAL PROCESSING CMOS LSI |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD6708CX | 制造商:NEC 制造商全稱:NEC 功能描述:IEBusa Inter Equipment Busa PROTOCOL CONTROL LSI |
| UPD6708GS | 制造商:NEC 制造商全稱:NEC 功能描述:IEBusa Inter Equipment Busa PROTOCOL CONTROL LSI |
| UPD6708GS(A) | 制造商:Renesas Electronics Corporation 功能描述: |
| UPD67100 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ASIC |
| UPD67101 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ASIC |
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