Section 24 Flash Memory
Rev. 1.00 Apr. 28, 2008 Page 751 of 994
REJ09B0452-0100
Reset state
Programmer
mode
User mode
User
program
mode
Boot mode
On-board programming mode
End of
programming/
erasure
Start of
programming/
erasure
RES
= 0
User mode setting
RES
= 0
Boot mode setting
Use
r boot mode
setting
RES
= 0
RES
= 0
RES
= 0
Programmer mode setting
User
boot mode
Figure 24.2 Mode Transition of Flash Memory
Table 24.1 Differences between Boot Mode, User Program Mode, and Programmer Mode
Item
Boot Mode
User Program Mode User Boot Mode
Programmer
Mode
Programming/
erasing environment
On-board
programming
On-board
programming
On-board
programming
PROM
programmer
Programming/
erasing enable MAT
•
User MAT
•
User boot
MAT
•
User MAT
•
User MAT
•
User MAT
•
User boot
MAT
All erasure
O (Automatic)
O
O
O (Automatic)
Block division
erasure
O
*
1
O
O
×
Program data
transfer
From host via
SCI
Via any device
Via any device
Via
programmer
Reset initiation MAT Embedded
program
storage area
User MAT
User boot MAT
*
2
Transition to user
mode
Changing mode
and reset
Changing FLSHE bit
setting
Changing mode
and reset
Notes: 1. All-erasure is performed. After that, the specified block can be erased.
2. In this LSI, the user programming mode is defined as the period from the timing when a
program concerning programming and erasure is started to the timing when the
program is completed. For details on a program concerning programming and erasure,
see section 24.8.2, User Program Mode.
Содержание H8S/2100 Series
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