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CHAPTER 18 IEBus CONTROLLER (V850/SC2)
558
User’s Manual U15109EJ3V0UD
(4) Slave reception
Figure 18-24. Slave Reception (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
Data
Data
Data
T
T
T
P
P
T
T
A
T
t4
t4
t5
t2
P
P T
A
t3
End of communication
End of frame
Communication start
Communication
start interrupt
P
O A
P
O
P
A
Remarks 1.
T: Timing error
P: Parity error
A: ACK error
O: Overrun 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 – end of communication
t4
Approx. 1012
µ
s
Receive data read interval
t5
Approx. 375
µ
s