CHAPTER 18 IEBus CONTROLLER (V850/SC2)
User’s Manual U15109EJ3V0UD
557
(3) Slave transmission
Figure 18-23. Slave Transmission (Interval of Interrupt Occurrence)
Start bit
Broad-
casting
Telegraph
length
Data
Master address
Slave address
Control
P A
P A
P A
P A
P A
P A
P
t1
T
T
T
U
Data
Data
Data
U
T
T
T
P
P
T
T
T
T
A
T
t5
t4
t3
t6
t7
t7
t2
A
P
End of communication
End of frame
Communication start
Communication
start interrupt
Status request
A
Remarks 1.
T: Timing error
P: Parity error
A: ACK error
U: Underrun error
: Data set interrupt (INTIE1)
2.
End of frame occurs at the end of 32-byte data.
(IEBus: at 6.29 MHz)
Item
Symbol
MIN.
Unit
Communication starts – timing error
t1
Approx. 96
µ
s
Communication starts – communication start interrupt
t2
Approx. 1192
µ
s
Communication start interrupt – timing error
t3
Approx. 15
µ
s
Communication start interrupt – status request
t4
Approx. 225
µ
s
Transmission data request interrupt interval
t5
Approx. 375
µ
s
Status request – timing error
t6
Approx. 15
µ
s
Status request – end of communication
t7
Approx. 787
µ
s