Mode Transition Diagram; Figure 17.2 Mode Transition Of Flash Memory - Renesas H8SX/1520 Series Hardware Manual

17.2

Mode Transition Diagram

When the mode pins are set in the reset state and reset start is performed, this LSI enters each
operating mode as shown in figure 17.2. Although the flash memory can be read in user mode, it
cannot be programmed or erased. The flash memory can be programmed or erased in boot mode,
user program mode, user boot mode, and programmer mode. The differences between boot mode,
user program mode, user boot mode, and programmer mode are shown in table 17.1.
ROM disabled mode
User mode
RAM emulation can be
available
Notes: * In this LSI, the user program mode is defined as the period from the timing when a program
concerning programming and erasure is started in user mode to the timing when the program is
completed.
1. Programming and erasure is started.
2. Programing and erasure is completed.
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RES = 0
ROM disabled mode
setting
2
*
User program
1
*
mode

Figure 17.2 Mode Transition of Flash Memory

Section 17 Flash Memory (0.18-(m F-ZTAT Version)
RES = 0
Reset state
Programmer mode setting
User boot
mode
Rev. 3.00 Mar. 14, 2006 Page 571 of 804
Programmer
mode
Boot mode
On-board programming mode
REJ09B0104-0300