UPD72042BGT NEC [NEC], UPD72042BGT Datasheet - Page 36

• Manufacturer Part Number: UPD72042BGT
• Description: LSI DEVICE FOR Inter Equipment Bus (IEBus) PROTOCOL CONTROL
• Manufacturer: NEC [NEC]

[Broadcast bit]
[Number of arbitrations] (Number of retries)
communication. The PD72042B automatically retries communication as many times as the number set in this field.
36
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).
This bit is used to select broadcast or separate communication.
This field is used to set the maximum number of retry operations to be performed if arbitration is lost in master
b6
0
0
0
0
1
1
1
1
MCR
Master communication register
Bit 7 = 0: Broadcast
Bit 7 = 1: Separate communication
b5
0
0
1
1
0
0
1
1
b4
0
1
0
1
0
1
0
1
Broadcast bit
Number of retries
b7
0
1
2
3
4
5
6
7
Number of arbitrations
b6
Data Sheet S13990EJ3V0DS
b4
b3
Control bits
Address
Read/write
When reset : Undefined (the pre-
b0
MCR
: 0110B (6H)
: Write
vious data is held)
PD72042B