HD64F3437TFI16V Renesas Electronics America, HD64F3437TFI16V Datasheet - Page 365

• Manufacturer Part Number: HD64F3437TFI16V
• Description: MCU FLASH 60K 100-TQFP
• Manufacturer: Renesas Electronics America

Specifications of HD64F3437TFI16V

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

14.5
The host interface provides buffering of asynchronous data from the host and slave processors, but
an interface protocol must be followed to implement necessary functions and avoid data
contention. For example, if the host and slave processors try to access the same input or output
data register simultaneously, the data will be corrupted. Interrupts can be used to design a simple
and effective protocol.
No
No
Application Note
Write 1 to P4DR
Write to ODR
P4DR = 0?
transferred?
All bytes
Yes
Yes
Figure 14.3 HIRQ Output Flowchart
Slave CPU
HIRQ output high
HIRQ output low
Hardware operations
Software operations
Interrupt initiation
Master CPU
ODR read
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