跳至主要內容
Knowledgebase
Home
Renesas Electronics Taiwan - Knowledgebase

When is the RAME bit in the System Control Register(SYSCR) used?

Latest Updated:03/25/2009

Question:

When is the RAME bit in the System Control Register(SYSCR) used?

Answer:

The RAME bit is used to protect the data in the on-chip RAM.The data in the on-chip RAM might be destroyed by hardware standby input or reset input, if the CPU's operation is reset asynchronously during writing to the on-chip RAM. If such processing is expected, the data in the on-chip RAM can be protected by prohibiting access to the on-chip RAM by setting the RAME bit.
Suitable Products
SH7144, SH7145
SH7058
SH7055
SH7050, SH7051
SH7052, SH7053, SH7054
SH7047, SH7049, SH7105, SH7107, SH7109
SH7046, SH7148, SH7101, SH7048, SH7104, SH7106, SH7108