32186 datasheet(161/1032 Pages) RENESAS

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INTERNAL MEMORY

6-19

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

FPROT = 0

FENTRY = 1

YES

FENTRY = 1

FPROT = 1

FPROT is not set to 1 if a write cycle

to any other area occurs during this time.

Figure 6.5.1 Protection Unlocking Flow

Flash Control Register 3 (FCNT3)

<Address: H’0080 01E4>

Bit Name

Function

0–2

No function assigned. Fix to "0."

FBSYCK

0: Command accepted normally

–

Busy check bit

1: Command not accepted normally

4–6

No function assigned. Fix to "0."

FPBSYCK

0: Command accepted normally

–

Prebusy check bit

1: Command not accepted normally

Flash Control Register 3 (FCNT3) is used when developing an internal flash memory write/erase program to

check whether commands have been accepted normally. This register does not need to be used for a program

that has been verified to be able to operate properly.

(1) FBSYCK (Busy Check) bit (Bit 3)

The FBSYCK bit is used to check whether the command of two or more cycles (confirmation command H'D0D0

or a command that requires write data) issued to the flash memory during flash E/W enable mode has been

accepted normally. Commands of two or more cycles are shown in Table 6.5.2. If the FBSYCK bit is found to be

"0" after issuing the busy check target command (See Table 6.5.2), it means that the busy check target com-

mand has been accepted normally. Conversely, if the FBSYCK bit is found to be "1," it means that the busy

check target command has not been accepted normally.

In addition to the above, the FBSYCK bit is set to "1" in the following cases:

1) When a prebusy check target command has been accepted

2) When the FRESET bit = "1"

3) When input on RESET# pin is pulled "L"

3456

FBSYCK

FPBSYCK

000

1000

6.5 Registers Associated with Internal Flash Memory

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