r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 686

• Manufacturer Part Number: r5f21346mnfp
• Description: Single-chip Mcus Incorporates The R8c Cpu Core
• Manufacturer: Renesas Electronics Corporation.

R8C/34M Group
R01UH0131EJ0100 Rev.1.00
Jun 21, 2011
Figure 32.12
Notes:
1. The interrupt vector table and interrupt routine for interrupts to be used must be allocated to an area other than the erase target area.
2. td(SR-SUS) is required until suspend is acknowledged after the FMR21 bit is set to 1.
3. When auto-erasure suspends, a flash ready status interrupt is generated.
The interrupt to enter suspend must be enabled beforehand.
Block Erase Flowchart in EW0 Mode (Flash Ready Status Interrupt Enabled and
Suspend Enabled)
Write the command code 20h
Write D0h to any block address
I = 1 (interrupt enabled)
Block erase completed
RDYSTIE = 1
FMR20 = 1
Start
Access the flash memory
Flash ready status
interrupt
RDYSTI = 0
FMR21 = 0
FST6 = 1?
REIT
(1, 3)
Yes
Maskable interrupt
No
FMR21 = 1
REIT
Full status check
I: Flag in CPU register
RDYSTI, FST6: Bits in FST register
RDYSTIE: Bit in FMR0 register
FMR20, FMR21: Bits in FMR2 register
(2)
(1)
32. Flash Memory
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