p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 498

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 19 Flash Memory (0.18-µm F-ZTAT Version)
19.1.2
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 19.1.
Table 19.1 Comparison of Programming Modes
Notes: 1. All erasure is performed. After that, the specified block can be erased.
• 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
• In user boot mode, boot operation of the optional interface can be performed with mode pin
Rev. 1.00 Sep. 21, 2006 Page 460 of 658
REJ09B0310-0100
Programming/
erasing
environment
Programming/
erasing enable
MAT
All erasure
Block division
erasure
Program data
transfer
Reset initiation
MAT
Transition to user
mode
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.
settings different from those in user program mode.
2. First, the reset vector is fetched from the embedded program storage MAT. After the
Mode Comparison
flash memory related registers are checked, the reset vector is fetched from the user
boot MAT.
Boot Mode
On-board
User MAT
User boot MAT
Ο (Automatic)
Ο*
From host via SCI Via optional device Via optional device Via programmer
Embedded
program storage
MAT
Changing mode
setting and reset
1
User Program
Mode
On-board
User MAT
Ο
Ο
User MAT
Changing FLSHE
bit setting
User Boot Mode
On-board
User MAT
Ο
Ο
User boot MAT*
Changing mode
setting and reset
2
Programmer
Mode
PROM
programmer
User boot MAT
Ο (Automatic)
×


User MAT