UPD72042BGT NEC [NEC], UPD72042BGT Datasheet - Page 34

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

[Local station address]
unit. A local station address is used as a slave address when the local station performs communication as a slave.
[Condition code]
34
b3, b2
b0
Bit position
UAR1 and UAR2 are registers used to set a local station unit address (12 bits) and condition code.
Set UAR1 and UAR2 after reset cancellation.
A local station address is used as a master address when the local station performs communication as the master
Remark Bit 1 of a condition code is not used. (Set the bit to either 0 or 1.)
UAR1
UAR2
Local station unit address register
00
01
10
11
0
1
Condition code
b7
b7
Local station address
(low-order 4 bits)
Communication is performed in mode 0.
Communication is performed in mode 1.
Undefined
The slave transmission section is disabled.
The slave transmission section is enabled.
Local station address (high-order 8 bits)
Data Sheet S13990EJ3V0DS
b4
Condition setting
b3
Condition code
Address
Read/write
When reset : Undefined (with the
b0
b0
UAR1
UAR2
: 0010B (2H) (UAR1)
: Write
0011B (3H) (UAR2)
previous data held)
PD72042B