UPD72042 Datasheet, PDF (60/92 Pages) NEC – LSI DEVICES FOR Inter Equipment BusTM (IEBusTM) PROTOCOL CONTROL

(1) Master transmission timing example 1
Minimum time
Approx. 2430 µs (mode 0)
Approx. 740 µs (mode 1)
Communication frame Control field Data-length field Data field
Header
Master address
field
Slave address
field
Control field
Data-length
field
Data field
CMR COMC
1000
CEX
MARQ
FLG
STRQ "0"
SLRE
RCR
MARC
SLRC
IRQ pin
0100
(Slave reception started)
0110 (Slave reception terminated)
0000 (Master transmission started)
0010
(Master transmission terminated normally)