參數(shù)資料
型號： UPD72042
廠商： NEC Corp.
英文描述： LSI DEVICES FOR Inter Equipment BusTM (IEBusTM) PROTOCOL CONTROL
中文描述： LSI器件間設(shè)備BusTM（IEBusTM）協(xié)議控制
文件頁數(shù)： 73/92頁
文件大小： 373K
代理商： UPD72042
μ
PD72042
73
Data Sheet S14870EJ1V0DS00
6.4.3 Command Processing Routine
This routine is executed when CORQ has been set by the application processing routine.
The command processing routine sets a command code, in the CMR register, to set the lock state, control
transmission/reception buffers, control communication, and set optional functions.
The commands for master communication and slave data transmission request are described in
Sections 6.4.4
and
6.4.5
.
Fig. 6-5 shows the flow of the command processing routine.
Fig. 6-5 Command Processing Routine
6.4.4 Master Communication Processing Routine
This routine is executed when MCRQ has been set by the application processing routine.
The master communication processing routine consists of the following three processing routines:
Master transmission processing routine 1
This routine is used to transmit data, as the master unit, starting from the first data in TBF.
Master transmission processing routine 2
This routine is used to start master transmission from the point at which the previous master transmission was
suspended.
Master reception processing routine
This routine is used to receive data, as the master unit, from a slave unit.
Start
Read FLG
CMR
←
Command code
End
;
CEX
0
1
Waiting for termination
of previous command
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