UPD72042BGT NEC [NEC], UPD72042BGT Datasheet - Page 26

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

(3) Data write mode
26
Note
Caution Register overwrite is started immediately after the eighth clock rising edge. All registers other
Serial clock counter
than TBF are overwritten at the eighth clock rising edge. (Data of less than eight clock periods
is ignored.)
reset pointer
SIO
State
SCK
C/D
Note
SIO pin input state
(selection of register write)
Control mode
0
Data Sheet S13990EJ3V0DS
A0 A1 A2 A3
D0 D1 D2 D3 D4 D5 D6 D7
Data write mode
PD72042B