UPD72042BGT NEC [NEC], UPD72042BGT Datasheet - Page 80

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

80
6.4.6 Transmission Processing Routine
transmission processing routine 1 (see 6.4.4 (1)), master transmission processing routine 2 (see 6.4.4 (2)), or the
slave data transmission processing routine (see 6.4.5).
This routine is executed when TRRQ has been set by the interrupt routine during the execution of master
Fig. 6-11 shows the flow of the transmission processing routine.
Notes 1. Indicates that transmission of the communication frame has ended (terminated normally or suspended).
2. Indicates that setting of the transmission data has been completed with the current TBF.
TBF
I > Number of bytes
Transmission data (I-th byte)
in tranmission data
Read STR
I
TRCF?
Fig. 6-11 Flow of Transmission Processing Routine
TFL?
Start
I + 1
N
0
00
Data Sheet S13990EJ3V0DS
1
10 or
Y
11
End 2
Note 2
MTRQF (STRQF)
TRRQ
End 1
Note 1
; Transmission terminated
0
normally or suspended?
0
PD72042B