Renesas RA Series Quick Design Guide

Renesas RA Family RA4 Quick Design Guide
R01AN5988EU0100 Rev.1.00 Page 47 of 51
Jul.21.21
Figure 37. RA4M3 Bus Connection
14.1 Bus Error Monitoring
The bus error monitoring system monitors each individual area. When an error is detected, an error is
returned to the requesting master IP using the AHB-Lite error response protocol.
14.1.1 Bus Error Types
The following types of errors can occur on each bus:
• Illegal address access.
• Bus master MPU error.
• TrustZone Filter error (MCUs that support Trustzone only).
• Bus error transmitted from each slave IP.
14.1.2 Operations When a Bus Error Occurs
When a bus error occurs, operation is not guaranteed, and the error is returned to the requesting master IP.
The bus errors that occur for each master are stored in the BUSnERRADD and BUSnERRSTAT registers.
These registers must only be cleared by a reset. For more information, see section “Bus Error Address
Register (BUSnERRADD)” and “Bus Error Status Register (BUSnERRSTAT)” in the Hardware User’s
Manual.
Note: The DMAC and DTC do not receive bus errors, so their operation is not affected by bus errors.

Renesas RA Series Specifications

General

Brand	Renesas
Model	RA Series
Category	Microcontrollers
Language	English