Write 1 to IRQ1E1
No
No
Figure 15.8 HIRQ Flowchart (Example of Channel 1)
Rev. 1.00, 05/04, page 410 of 544
Slave CPU
ODR1 write
OBF1 = 0?
Yes
All bytes
transferred?
Yes
SERIRQ IRQ1 output
SERIRQ IRQ1
source clearance
Master CPU
Interrupt initiation
ODR1 read
Hardware operation
Software operation