參數(shù)資料
型號: UPD72042AGT
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
文件頁數(shù): 38/92頁
文件大?。?/td> 541K
代理商: UPD72042AGT
μ
PD72042A, 72042B
38
DATA SHEET S13990EJ2V0DS00
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).
b7
Broadcast bit
b6
Number of arbitrations
b4
b3
b0
Control bits
MCR
[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
PD72042A and
μ
PD72042B automatically retry communication as many times as the number
set in this field.
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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