ST25DV04K datasheet(30/220 Pages) STMICROELECTRONICS

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Memory management

ST25DV04K ST25DV16K ST25DV64K

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DocID027603 Rev 4

Programming ENDA3 to FFh in step 2.a would have resulted in into an error, since rule

ENDAi-1 < ENDAi would not been respected (ENDA2 = ENDA3 in that case).

Registers for user memory area configuration

Split of user memory in four areas:

ENDA3 is not updated as it is already set to end of memory.

ENDA2 is not updated as it is already set to end of memory.

Set ENDA1 = 3Fh (Last block of Area 1: (3Fh x 8) + 7 = 01FFh)

Set ENDA2 = 5Fh (Last block of Area 1: (5Fh x 8) + 7 = 02FFh)

Set ENDA3 = BFh (Last block of Area 1: (BFh x 8) + 7 = 05FFh)

–

Area1 from Block 0000h to 01FFh (512 Blocks)

–

Area2 from Block 0200h to 02FFh (256 Blocks)

–

Area3 from Block 0300h to 05FFh (768 Blocks)

–

Area4 from Block 0600h to 07FFh (512 Blocks).

Return to a split in two equal areas:

Set ENDA3 = FFh

Set ENDA2 = FFh

Set ENDA1 = 7Fh (Last block of Area 1: (7Fh x 8) + 7 = 03FFh)

–

Area1 from Block 0000h to 03FFh (1024 Blocks)

–

Area2 from Block 0400h to 07FFh (1024 Blocks)

–

There is no Area3.

–

There is no Area4.

Table 5. ENDA1(1)

Command

Read Configuration (cmd code A0h) @05h

Write Configuration (cmd code A1h) @05h

Type

R always, W if RF configuration security session is open and configuration not

locked

I2C

Address

E2 = 1, 0005h

Type

R always, W if I2C security session is open

Bit

Name

Function

Factory Value

b7-b0

ENDA1

End Area 1 = 8*ENDA1+7 when expressed in blocks (RF)

End Area 1 = 32*ENDA1+31 when expressed in bytes (I2C)

ST25DV04K-XX: 0Fh

ST25DV16K-XX: 3Fh

ST25DV64K-XX: FFh

1. Refer to Table 8: System configuration memory map for the ENDA1 register.

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