HD64570 Datasheet, PDF (353/469 Pages) Hitachi Semiconductor – Serial Communications Adaptor

Reception Processing Routine: An example of a reception processing routine is given in
figure 9.6.
Start
Read ST1 and ST2
Abort or idle
detection
Analyze interrupt source
Clear interrupt source bit
Process interrupt,
issue EI instruction
Return
ST1: Status register 1
ST2: Status register 2
Note: An interrupt is also generated when the DMAC completes reception of a frame.
Figure 9.6 RXINT Interrupt Processing Routine (using HD64180)
9.2 Application Circuits
9.2.1 System Configuration Example
A typical system configuration incorporating the SCA is shown in figure 9.7.
Rev. 0, 07/98, page 337 of 453