973
User’s Manual U16580EE3V1UD00
Chapter 22
Internal RAM Parity Check Function
The V850E/PH2 microcontroller is provided with a parity check function for the internal RAM (iRAM).
22.1 Features
•
Maskable interrupt (INTPERR) on detection of parity error
•
Indication of internal RAM address of detected parity error
•
Indication of erroneous byte within 32-bit word
22.2 Operation
Each byte of data stored in the internal RAM is checked by its parity bit. A maskable interrupt
(INTPERR) is generated, if a parity mismatch is detected on iRAM read operation. In this case the
address of the erroneous data is latched in the RAMPADD register and the erroneous byte(s) are
indicated in the RAMERR register.
Caution:
Ensure that all internal RAM data is initialized on a word (32-bit) base by a write
operation before first read access is made. It is important to initialize the whole
memory word, even if only byte or half word is used. Otherwise a parity fail may be
indicated mistakenly.
Summary of Contents for MuPD70F3187
Page 6: ...6 Preface User s Manual U16580EE3V1UD00 ...
Page 16: ...16 User s Manual U16580EE3V1UD00 ...
Page 28: ...28 User s Manual U16580EE3V1UD00 ...
Page 32: ...32 User s Manual U16580EE3V1UD00 ...
Page 84: ...84 Chapter 2 Pin Functions User s Manual U16580EE3V1UD00 MEMO ...
Page 144: ...144 Chapter 3 CPU Functions User s Manual U16580EE3V1UD00 MEMO ...
Page 312: ...312 Chapter 9 16 Bit Timer Event Counter P User s Manual U16580EE3V1UD00 MEMO ...
Page 534: ...534 Chapter 11 16 bit Timer Event Counter T User s Manual U16580EE3V1UD00 ...
Page 969: ...969 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 MEMO ...
Page 970: ...970 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 ...
Page 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO ...
Page 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO ...
Page 1006: ...1006 Chapter 24 Flash Memory User s Manual U16580EE3V1UD00 MEMO ...
Page 1036: ...1036 Chapter 27 Recommended Soldering Conditions User s Manual U16580EE3V1UD00 MEMO ...
Page 1046: ...1046 Appendix A Index User s Manual U16580EE3V1UD00 MEMO ...
Page 1052: ...1052 User s Manual U16580EE3V1UD00 ...
Page 1053: ......