HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 353

• Manufacturer Part Number: HD64570
• Description: Serial Communications Adaptor
• Manufacturer: HITACHI [Hitachi Semiconductor]

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