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參數(shù)資料
| 型號： | UPD6708CX |
| 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)： | 36/72頁 |
| 文件大?。?/td> | 292K |
| 代理商： | UPD6708CX |
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36
μ
PD6708
(2)
Validity of SETSD command
When SETSD command is executed, it remains valid until one of the following cases arises.
‘Data read and lock’ (control bits: 3H) or ‘data read’ (control bits: 7H) is received from the master unit.
ABORT command is executed.
Power is turned off, or the reset mode is entered.
When the SETSD command is valid, WDB functions as the slave transmit buffer.
Caution The SETSD command can be executed even if the unit is placed in the slave transmission selection halted
state by INIT command.
(3)
Example
When the SETSD command is used to set the number of transmit data bytes to 5, and the transmit data to ABH, CDH,
EFH, 14H, and 25H, the contents of WDB and CMR are as shown below.
Caution Transmit data 14H and 25H should be set when the above command parameters have been read and WDB
is empty.
5.2.7
GETSTA command (command code: 0110)
The GETSTA command is used by a unit to check whether it is locked by another unit.
(1)
Functions
<1>
Reads the lock status which indicates whether or not this unit is locked by another unit. ‘1J’ is placed in RDB if the
unit is locked, and ‘0H’ if not locked.
<2>
The address (12 bits) of a locked unit is placed in RDB. This data is meaningless when the unit is not locked.
After execution of GETSTA command, the data placed in RDB is as follows.
0000
0101
1010
1011
0100
0101
First Byte
Second Byte
Third Byte
Fourth Byte
WDB
CMR
Second
Data Byte
Third
Data Byte
Number of Transmit
Data Bytes
First
Data Byte
1100
1101
1110
1111
Lock Status
Address of Locked Unit (12 Bits)
First Byte
Second Byte
MSB
LSB
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相關(guān)代理商/技術(shù)參數(shù) |
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| UPD6708GS | 制造商:NEC 制造商全稱:NEC 功能描述:IEBusa Inter Equipment Busa PROTOCOL CONTROL LSI |
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| UPD67101 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ASIC |
| UPD67240 | 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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