HD64F7051SFJ20V Datasheet, PDF (609/843 Pages) Renesas Technology Corp – Hardware Manual Renesas 32-Bit RISC

Section 19 ROM (256 kB Version)
19.2.2 Mode Transitions
When the mode pins and the FWE pin are set in the reset state and a reset-start is executed, the
SH7050 enters one of the operating modes shown in figure 19.2. In user mode, flash memory can
be read but not programmed or erased.
Flash memory can be programmed and erased in boot mode, user program mode, and programmer
mode.
*1
User mode
MD1 = 1,
FWE = 0
RES = 0
Reset state
RES = 0
MD1 = 1,
FWE = 1
RES = 0
*2
FWE = 1 FWE = 0
User
*1
program mode
MD1 = 0, RES = 0
FWE = 1
Programmer
mode
On-board programming mode
Boot mode
Notes: Only make a transition between user mode and user program mode when the CPU is
not accessing the flash memory.
1. RAM emulation possible
2. MD0 = 1, MD1 = 0, MD2 = 1, MD3 = 1
Figure 19.2 Flash Memory Mode Transitions
Rev. 5.00 Jan 06, 2006 page 587 of 818
REJ09B0273-0500