參數(shù)資料
型號(hào)： UPD72042GT
廠商： NEC Corp.
英文描述： LSI DEVICES FOR Inter Equipment BusTM (IEBusTM) PROTOCOL CONTROL
中文描述： LSI器件間設(shè)備BusTM（IEBusTM）協(xié)議控制
文件頁(yè)數(shù)： 36/92頁(yè)
文件大?。?/td> 373K
代理商： UPD72042GT
μ
PD72042
36
Data Sheet S14870EJ1V0DS00
MCR
Address
Read/write
When reset : Undefined (the pre-
vious data is held)
: 0110B (6H)
: Write
Master communication register
The MCR register is used to set a master communication condition.
Set MCR while the value of MARQ of the FLG register is 0 (while master communication is not requested).
[Broadcast bit]
This bit is used to select broadcast or separate communication.
Bit 7 = 0: Broadcast
Bit 7 = 1: Separate communication
[Number of arbitrations]
(Number of retries)
This field is used to set the maximum number of retry operations to be performed if arbitration is lost in master
communication. The
μ
PD72042 automatically retries communication as many times as the number set in this field.
b7
Broadcast bit
b6
Number of arbitrations
b4
b3
b0
Control bits
MCR
b6
b5
b4
Number of retries
0
0
0
0
0
0
1
1
0
1
0
2
0
1
1
3
1
0
0
4
1
0
1
5
1
1
0
6
1
1
1
7
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