R8C/13 Group
Figures 17.5 shows the timing on suspend operation.
17.4 CPU Rewrite Mode
Erase
Starts
Erase
Suspends
Erase
Starts
Erase
Ends
During Erase
During Erase
FMR00
FMR46
Check that the FMR00 bit is
set to “0”, and that the erase
operation has not ended.
Check the status,
and that the program
ends normally.
Figure 17.5 Timing on Suspend Operation
Figures 17.6 and 17.7 show the setting and resetting of EW0 mode and EW1 mode, respectively.
EW0 mode operation procedure
Rewrite control program
Set the FMR01 bit by writing “0” and then “1”
(CPU rewrite mode enabled)(2)
Set CM0 and CM1 registers(1)
Execute software commands
Transfer a CPU rewrite mode based rewrite control
program to any area other than the flash memory
Execute the Read Array command(3)
Jump to the rewrite control program which has been
transferred to any area other than the flash memory
(The subsequent processing is executed by the
rewrite control program in any area other than the
flash memory)
Write “0” to the FMR01 bit
(CPU rewrite mode disabled)
Jump to a specified address in the flash memory
NOTES:
1. Select 5 MHz or less for CPU clock using the CM06 bit in the CM0 register and the CM17 to CM16 bits in the CM1 register.
2. To set the FMR01 bit to “1”, write “0” and then “1” in succession. Make sure no interrupts will occur before writing “1” after writing “0”.
Write to the FMR01 bit from a program in other than the flash memory.
3. Disables the CPU rewrite mode after executing the Read Array command.
Figure 17.6 Setting and Resetting of EW0 Mode
EW1 mode operation procedure
Program in ROM
Set the FMR01 bit by writing “0” and then “1” (CPU
(1)
rewrite mode enabled)
Set the FMR11 bit by writing “0” and then “1” (EW1
mode)
Execute software commands
NOTES:
1. To set the FMR01 bit to “1”, write
“0” and then “1” in succession.
Make sure no interrupts will occur
Write “0” to the FMR01 bit
(CPU rewrite mode disabled)
before writing “1” after writing “0”.
Figure 17.7 Setting and Resetting of EW1 Mode
Rev.1.20 Jan 27, 2006 page 173 of 205
REJ09B0111-0120
RENESAS [ RENESAS TECHNOLOGY CORP ]
