Mode Transitions; Figure 21.2 Mode Transition For Flash Memory - Renesas H8S Series Hardware Manual

21.1.1

Mode Transitions

When each mode pin and the FWE pin are set in the reset state and the reset is started, this LSI
enters each operating mode as shown in figure 21.2.
• Flash memory can be read in user mode, but cannot be programmed or erased.
• Flash memory can be read, programmed, or erased on the board only in user program mode,
user boot mode, and boot mode.
• Flash memory can be read, programmed, or erased by means of the PROM programmer in
programmer mode.
FLSHE = 0
→ FWE = 0
User mode
FWE = 1 →
FLSHE = 1
Reset state
User program
mode

Figure 21.2 Mode Transition for Flash Memory

Section 21 Flash Memory (0.18-µm F-ZTAT Version)
RES = 0
Programmer mode setting
User boot
mode
On-board programming mode
Rev. 3.00 Jul. 14, 2005 Page 737 of 986
Programmer
mode
Boot mode
REJ09B0098-0300