r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 668

• Manufacturer Part Number: r5f21368sdfp
• Description: Renesas Mcu R8c Family / R8c/3xt-a Series
• Manufacturer: Renesas Electronics Corporation.

Under development
R8C/36T-A Group
R01UH0240EJ0001 Rev.0.01
Apr 28, 2011
Figure 26.5
26.5.4
Table 26.5
Notes:
Areas
during
erasure
execution
before
entering
suspend
Program ROM
FMR2 register
RDYSTI bit in
FMR21 bit in
FST register
FST register
FST register
1. E indicates operation is enabled by using the suspend function, D indicates operation is disabled, and N/A indicates no combination is available.
2. Operation cannot be suspended during programming.
3. The block erase command can be executed for erasure. The program, lock bit program, and read lock bit status commands can be executed for
4. The MCU enters read array mode immediately after entering erase-suspend.
5. Applicable only to products with on-chip data flash.
6. The program ROM area can be read with the BGO function while programming or block erasing data flash.
FST7 bit in
FST6 bit in
Data flash
The suspend function halts the auto-erase operation temporarily during auto-erasure.
When auto-erasure is suspended, the next operation can be executed (refer to Table 26.5 Executable
Operation during Suspend).
• When auto-erasure of any block in data flash is suspended, auto-programming and reading of another block
• When auto-erasure of data flash is suspended, auto-programming and reading of program ROM can be
• When auto-erasure of any block in program ROM is suspended, auto-programming and reading of another
• When auto-erasure of program ROM is suspended, auto-programming and reading of data flash can be
• To check the suspend, verify the FST7 bit in the FST register is set to 1 (ready), then verify the FST6 bit in the
Figure 26.5 shows the Suspend Operation Timing.
programming.
The clear status register command can be executed when the FST7 bit in the FST register is set to 1 (ready).
The operation of block blank check is disabled during suspend.
can be executed.
executed.
block can be executed.
executed.
FST register is set to 1 (during erase-suspend) to confirm whether erasure has been suspended. When the
FST6 bit is set to 0 (other than erase-suspend), erasure is completed.
Data flash
Program
ROM
Suspend Operation
program
User
Preliminary document
Specifications in this document are tentative and subject to change.
Executable Operation during Suspend
Suspend Operation Timing
Command
issue
Erase
execution before entering
N/A
D
(Block during erasure
program
User
Data flash
suspend)
Program
N/A
FMR21
bit to 1
D
Set
Erase
1 is set automatically
Read
N/A
D
td(SR-SUS)
program
User
Erase
execution before entering
(Block during no erasure
D
D
Set to 0 by a program
Flash ready
Data flash
(readable)
suspend)
Suspend
handling
interrupt
Program
E
E
Operation during Suspend
Data
read
Read
1 is set automatically
(readable)
Command
E
E
Suspend
issue
Erase
execution before entering
N/A
Program
program
D
(Block during erasure
User
Program ROM
Set to 0 by a program
suspend)
Program
interrupt
handling
N/A
ready
Flash
D
(readable)
Suspend
1 is set automatically
FMR21
bit to 0
Read
Set
N/A
D
program
Erase
User
Erase
execution before entering
Set to 0 by a program
(Block during no erasure
D
D
handling
Program ROM
interrupt
26. Flash Memory
Flash
ready
Page 637 of 725
suspend)
Program
E
E
program
User
Read
E
E
(6)