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Chapter 22
Internal RAM Parity Check Function
User’s Manual U16580EE3V1UD00
22.3 Control
Registers
(1)
Internal RAM parity error status register (RAMERR)
The RAMERR register is an 8-bit register that reflects the parity error flags of the four bytes of one
word (32 bits) in the internal RAM. The corresponding error flag (bits RAE0 to RAE3) is set and a
maskable interrupt (INTPERR) is generated, if a parity error is detected during read access.
This register can be read or written in 8-bit or 1-bit units.
Reset input clears this register to 00H.
Figure 22-1:
Internal RAM Parity Error Status Register (RAMERR)
After reset:
00H
R/W
Address:
FFFFF4C0H
7
6
5
4
3
2
1
0
RAMERR
0
0
0
0
RAE3
RAE2
RAE1
RAE0
RAEn
Internal RAM Parity Error Flag
0
No parity error detected in internal RAM.
1
Parity error detected in internal RAM for byte position n.
Remark:
The RAEn bit can be both read and written, but it can only be cleared by writing
0 to it, and it cannot be set by writing 1 to it.
n
Bit Name
Function
0
RAE0
Parity error caused by bits 0 to 7
1
RAE1
Parity error caused by bits 8 to 15
2
RAE2
Parity error caused by bits 16 to 23
3
RAE3
Parity error caused by bits 24 to 31
Содержание MuPD70F3187
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Страница 192: ...192 Chapter 5 Memory Access Control Function μPD70F3187 only User s Manual U16580EE3V1UD00 MEMO ...
Страница 312: ...312 Chapter 9 16 Bit Timer Event Counter P User s Manual U16580EE3V1UD00 MEMO ...
Страница 534: ...534 Chapter 11 16 bit Timer Event Counter T User s Manual U16580EE3V1UD00 ...
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Страница 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO ...
Страница 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO ...
Страница 1006: ...1006 Chapter 24 Flash Memory User s Manual U16580EE3V1UD00 MEMO ...
Страница 1036: ...1036 Chapter 27 Recommended Soldering Conditions User s Manual U16580EE3V1UD00 MEMO ...
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