Mode Comparison; Table 21.1 Comparison Of Programming Modes - Renesas H8S Series Hardware Manual

Section 21 Flash Memory (0.18-µm F-ZTAT Version)
21.1.2

Mode Comparison

The comparison table of programming and erasing related items about boot mode, user program
mode, user boot mode, and programmer mode is shown in table 21.1.

Table 21.1 Comparison of Programming Modes

Boot Mode
Programming/ On-board
erasing
environment
Programming/ User MAT
erasing enable User boot MAT
MAT
Ο (Automatic)
All erasure
Ο*
Block division
erasure
Program data From host via SCI Via optional device Via optional device Via programmer
transfer
Reset initiation Embedded
MAT program storage
MAT
Transition to user Changing mode
mode setting and reset
Notes: 1. All erasure is performed. After that, the specified block can be erased.
2. First, the reset vector is fetched from the embedded program storage MAT. After the
flash memory related registers are checked, the reset vector is fetched from the user
boot MAT.
• The user boot MAT can be programmed or erased only in boot mode and programmer mode.
• In boot mode, the user MAT and user boot MAT are totally erased. Then, the user MAT or
user boot MAT can be programmed by means of commands. Note that the contents of the
MAT cannot be read until this state.
Boot mode can be used for programming only the user boot MAT and then programming the
user MAT in user boot mode. Another way is to program only the user MAT since user boot
mode is not used.
• In user boot mode, boot operation of the optional interface can be performed with mode pin
settings different from those in user program mode.
Rev. 3.00 Jul. 14, 2005 Page 738 of 986
REJ09B0098-0300
User Program
Mode
On-board
User MAT
Ο
Ο
1
User MAT
Changing FLSHE
bit and FWE pin
Programmer
User Boot Mode Mode
On-board PROM
programmer
User MAT User MAT
User boot MAT
Ο Ο (Automatic)
×
Ο

2
User boot MAT*

Changing mode
setting and reset