Renesas H8SX/1520 Series Hardware Manual page 653

Section 17 Flash Memory (0.18-(m F-ZTAT Version)
Memory MAT switching is enabled by setting FMATS. However note that access to a memory
MAT is not allowed until memory MAT switching is completed. During memory MAT switching,
the LSI is in an unstable state, e.g. if an interrupt occurs, from which memory MAT the interrupt
vector is read is undetermined. Perform memory MAT switching in accordance with the
description in section 17.11, Switching between User MAT and User Boot MAT.
Except for memory MAT switching, the programming procedure is the same as that in user
program mode.
The area that can be executed in the steps of the procedure program (on-chip RAM and user
MAT) is shown in section 17.8.4, On-Chip Program and Storable Area for Program Data.
Rev. 3.00 Mar. 14, 2006 Page 615 of 804
REJ09B0104-0300
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