PD72042B_15 Datasheet, PDF (76/92 Pages) Renesas Technology Corp – LSI DEVICE FOR Inter Equipment BusTM (IEBusTM) PROTOCOL CONTROL

µPD72042B
(1) Master transmission processing routine 1
Fig. 6-6 shows the flow of master transmission processing routine 1.
Fig. 6-6 Flow of Master Transmission Processing Routine 1
Start
SAR1 ← Slave address (four low-order bits)
SAR2 ← Slave address (eight high-order bits)
MCR ← Broadcast bits, number of arbitrations,
and control bits (The MSB is 1.)
Read STR
1
TEP?
0
Read FLG
1
CEX?
0
CMR ← 00010000
; Waiting for termination of previous command?
; Set clear command for transmission buffer.
Read FLG
1
CEX?
0
TBF ← Number of bytes
in transmission data
I←1
; Waiting for termination of processing of
transmission buffer clear command?
; Initialize I.
I > Number of bytes
Y
in tranmission data
N
Read STR
1
TFL?
0
I←I+1
; Setting tranmission data in TBF completed?
CMR← 00001000
; Set master communication
request command.
TBF ← Transmission data (I-th byte)
Read FLG
1
CEX?
0
MTRQF← 1
End
; Waiting for termination of
processing of master communication
request command?
74
Data Sheet S13990EJ3V0DS