32186 datasheet(174/1032 Pages) RENESAS

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INTERNAL MEMORY

6-32

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

6.6 Programming Internal Flash Memory

(1) Flash E/W enable mode

Flash E/W enable mode is a mode in which the internal flash memory can be programmed or erased. In

flash E/W enable mode, no programs can be executed in the internal flash memory. Therefore, the neces-

sary program must be transferred into the internal RAM before entering flash E/W enable mode, so that it

can be executed in the internal RAM.

(2) Entering flash E/W enable mode

Flash E/W enable mode can only be entered when operating in single-chip, external extension or boot

mode. Furthermore, it is only when the FP pin = "H" and the Flash Control Register 1 (FCNT1) FENTRY bit

= "1" that flash E/W enable mode can be entered. Flash E/W enable mode cannot be entered when operat-

ing in processor mode or the FP pin = "L."

(3) Detecting the MOD0 and MOD1 pin levels

The MOD0 and MOD1 pin levels ("H" or "L") can be known by checking the P8 Data Register (Port Data

P8 Data Register (P8DATA)

<Address: H’0080 0708>

123456

P87DT

P86DT

P85DT

P84DT

P83DT

P82DT

MOD1DT

MOD0DT

????????

Bit Name

Function

MOD0DT (P80DT)

0: MOD0 pin = "L"

–

MOD0 data bit

1: MOD0 pin = "H"

MOD1DT (P81DT)

0: MOD1 pin = "L"

–

MOD1 data bit

1: MOD1 pin = "H"

P82DT

At read

Port P82 data bit

Depends on how the Port Direction Register is set

P83DT

• If direction bit = "0" (input mode)

Port P83 data bit

0: Port input pin = "L"

P84DT

1: Port input pin = "H"

Port P84 data bit

• If direction bit = "1" (output mode) (Note 1)

P85DT

0: Port output latch = "0" / Port pin level = "L"

Port P85 data bit

1: Port output latch = "1" / Port pin level = "H"

P86DT

At write

Port P86 data bit

Write to the port output latch

P87DT

Port P87 data bit

Note 1: To select the port data to read, use the Port Input Special Function Control Register’s port input data select bit (PISEL).

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