Datasheet

Section 20 Flash Memory (0.18-μm F-ZTAT Version)
Rev.6.00 Mar. 18, 2009 Page 721 of 980
REJ09B0050-0600
20.1.2 Mode Comparison
The comparison table of programming and erasing related items about boot mode, user program
mode, user boot mode, and PROM mode is shown in table 20.1.
Table 20.1 Comparison of Programming Modes
Boot mode
User program
mode User boot mode PROM mode
Programming/
erasing
environment
On-board
programming
On-board
programming
On-board
programming
Off-board
programming
Programming/
erasing enable
MAT
User MAT
User boot MAT
User MAT User MAT User MAT
User boot MAT
All erasure (Automatic) (Automatic)
Block division
erasure
*
1
×
Program data
transfer
From host via
SCI
From optional
device via RAM
From optional
device via RAM
Via programmer
Reset initiation
MAT
Embedded
program storage
MAT
User MAT User boot MAT
*
2
⎯
Transition to
user mode
Changing mode
setting and reset
Changing FLSHE
bit
Changing mode
setting and reset
⎯
Notes: 1. All-erasure is performed. After that, the specified block can be erased.
2. Firstly, 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 PROM mode.
• The user MAT and user boot MAT are erased in boot mode. Then, the user MAT and user boot
MAT can be programmed by means of the command method. However, the contents of the
MAT cannot be read until this state.
Only user boot MAT is programmed and the user MAT is programmed in user boot mode or
only user MAT is programmed because user boot mode is not used.
• The boot operation of the optional interface can be performed by the mode pin setting different
from user program mode in user boot mode.