32182 datasheet(141/755 Pages) RENESAS

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6-6

INTERNAL MEMORY

32182 Group User’s Manual (Rev.1.0)

6.4 Registers Associated with the Internal Flash Memory

6.4.2 Flash Status Registers

There are two registers to indicate the status of the internal flash memory: Flash Status Register 1 (FSTAT1)

located in the SFR area (H’0080 01E1) and Flash Status Register 2 (FSTAT2) included in the internal flash

memory. Use these two status registers (FSTAT1 and FSTAT2) to control the programming or erase operation

performed on the internal flash memory.

Flash Status Register 1 (FSTAT1)

<Address: H’0080 01E1>

1011121314

b15

FSTAT

Bit Name

Function

8–14

No function assigned. Fix to "0".

FSTAT

0: Busy

–

Ready/busy status bit

1: Ready

Flash Status Register 1 (FSTAT1) is a read-only status register used to know the status of the programming or

erase operation performed on the internal flash memory. When FSTAT = "0" (busy), the internal flash memory is

being programmed or erased, during which time do not start a new programming or erase operation on it. When

FSTAT = "1" (ready), a new programming or erase operation can be started on it.

Furthermore, while FSTAT = "0" (busy), do not operate on the FCNT4 register FRESET bit described later.

6.4.3 Flash Status Register 2 (FSTAT2)

Flash Status Register 2 (FSTAT2)

1011121314

b15

WRERR2

WRERR1

ERASE

FBUSY

Bit Name

Function

FBUSY

0: Being programmed or erased

–

Flash busy bit

1: Ready state

No function assigned. Fix to "0".

0–

ERASE

0: Erase normally operating or terminated

–

Erase status confirmation bit

1: Erase error occurred

WRERR1

0: Programming normally operating or terminated

–

Write status confirmation bit 1

1: Programming error occurred

WRERR2

0: Programming normally operating or terminated

–

Write status confirmation bit 2

1: Over-programming occurred

13–15

No function assigned. Fix to "0".

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