RH850 datasheet(25/66 Pages) RENESAS

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Data Flash Access Library - Type T01, European Release

User Interface (API)

R01US0079ED0103

User Manual

The following settings should be configured by user:

AUTHENTICATION_ID: A 16 byte access ID code.

The ID code is used to secure access to:

On Chip Debug unit

Serial programming

Self-programming only on older F1x devices. Newer devices will simply ignore a wrong ID

code so self-programming feature is always available.

On older devices where ID code is still checked, a wrong code will not result in a failed

initialization but FDL commands will fail to operate with a R_FDL_ERR_PROTECTION error

status.

CPU_FREQUENCY_MHZ: This defines the internal CPU frequency in MHz unit, rounded up to

the nearest integer, e.g. for 24.3 MHz set CPU_FREQUENCY_MHZ to 25. Please check the Device

Manual for limit values

FDL_POOL_SIZE: It defines the number of blocks to be accessed by the FDL for user access

and EEL access. Usually it is set to the total number of blocks physically available on the device.

For example, if the device is equipped with 32 KB of Data Flash and the block size is 64 bytes,

then FDL_POOL_SIZE can be any value up to 512

EEL_POOL_START: It defines the starting block of the EEL-Pool. If FDL is used without EEL on

top, the value should be set to 0

EEL_POOL_SIZE: It defines the number of blocks used for the EEL-Pool. If FDL is used without

EEL on top, the value should be set to 0

FDL block size is always equal to the physical block size of Data Flash.

Example of descriptor when FDL is used alone:

/* default access code */

#define AUTHENTICATION_ID

{ 0xFFFFFFFF, \

0xFFFFFFFF, \

0xFFFFFFFF }

#define CPU_FREQUENCY_MHZ

(80)

/* FDL pool will use 512 blocks * 64 bytes = 32KB, no EEL pool */

#define FDL_POOL_SIZE

(512)

#define EEL_POOL_START

(0)

#define EEL_POOL_SIZE

(0)

Example of descriptor when EEL is used:

/* default access code */

#define AUTHENTICATION_ID

{ 0xFFFFFFFF, \

0xFFFFFFFF, \

0xFFFFFFFF }

#define CPU_FREQUENCY_MHZ

(80)

/* FDL pool will use 32KB, EEL pool occupies fist 16 KB */

#define FDL_POOL_SIZE

(512)

#define EEL_POOL_START

(0)

#define EEL_POOL_SIZE

(256)

EEL may be configured to use virtual blocks. A virtual block size is an integer multiple of physical block

size and it is aligned to physical blocks. Please consult EEL documentation for details.

Example of descriptor when EEL is used with virtual block size 32 times the size of physical block size:

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