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UPD72042 Datasheet(PDF) 39 Page - NEC

Part # UPD72042
Description  LSI DEVICES FOR Inter Equipment BusTM (IEBusTM) PROTOCOL CONTROL
PDF  92 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD72042 Datasheet(HTML) 39 Page - NEC

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µPD72042
39
Data Sheet S14870EJ1V0DS00
STR
Address
: 0000B (0H)
Read/write
: Read
Status register
When reset : 0101
××××B
STR is a one-byte read register used to indicate the states of TBF and RBF.
[TFL]
1 : TBF is full.
0 : TBF is not full. The microcomputer can load data into TBF.
[TEP]
1 : TBF is empty. The microcomputer can load initial data into TBF.
0 : TBF is not empty.
[RFL]
1 : RBF is full.
0 : RBF is not full.
[REP]
1 : RBF is empty.
0 : RBF is not empty. The microcomputer can read data from RBF.
b7
TFL
b6
TEP
b5
RFL
b4
b3
b0
—
STR
b2
b1
REP
—
—
—



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