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參數(shù)資料
| 型號(hào)： | 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(yè)數(shù)： | 31/72頁(yè) |
| 文件大?。?/td> | 292K |
| 代理商： | UPD6708CX |
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31
μ
PD6708
(2)
Read command
The command code of the read command is shown in Table 5-3.
Table 5-3. Command Code of Read Command
Command Code
(Lower 4 Bits of
CMR)
Data Placed in RDB after Command Execution
Command Name
First Byte
Second Byte
GETSTA
0110
Lock status
Address of locked unit (12 bits)
Remark
With a read command, the command execution result is placed in RDB, and therefore it is performed in the
reception disabled state.
5.2
Communication Control Command Functions
5.2.1
INIT command (command code: 0000)
(1)
Functions
<1> Unit address setting
This command sets the unit address (12 bits), The unit address will be used as the master address when a unit is
communicating as the master unit, and as the slave address when a unit is communicating as the slave.
<2> Condition setting
The status of bit 4 of IEBus slave status is set.
Slave transmission block operation enabled, stopped (bit 4)
(Setting of use/non-use of the function that transmits data to the master unit)
The communication mode to be used is set.
Table 5-4. Condition Setting Method
Condition Setting Code
Condition Setting Contents
Bits 3 and 2
00
Communication performed in mode 0
01
Communication performed in mode 1.
10
Communication performed in mode 2.
11
Undefined
Bit 1
0
Fixed at ‘0’
Bit 0
0
Slave transmission block stopped
1
Slave transmission block operational
The local-station address and condition setting contents set by INIT command retain their set values unless power
is turned off or reset mode is entered (see
4.3 “Reset Mode”
).
<3> Slave status initialization
The slave status is initialized as shown in Table 5-5.
MSB
LSB
MSB
LSB
MSB
LSB
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