ATECC508A datasheet(59/109 Pages) MICROCHIP

59 / 109 page

Table 9-7. Legal Block/Slot Values

Zone

Name

Legal

Block

Legal

Slot

Notes

Config

0–3

—

Addresses below 16 (Block 0, Offset 16) can never be written. Addresses from

84-87 cannot be written using the Write command. Both 4-byte and 32-byte

reads/writes are permitted.

OTP

0–1

—

When OTPmode is read-only, all offsets in both blocks are available to use

with 4 or 32 byte reads. If OTPmode is consumption, then writes are also

permitted to all offsets.

Data

0–1

0-7

All offsets in all slots available for both Read and Write. A 4-byte access is

permitted on a particular slot only if SlotConfig.IsSecret is zero.

0-12

0-2

9-15

In the following table, address is the value to be passed to the Read and/or Write commands as the

address parameter to access data in the specific blocks using a 32 byte Read or Write. Size is the

number of implemented EEPROM bytes within that particular block.

Note: Slot 8 contains an additional nine blocks, each containing 32 bytes that are not included in

the table below.

To use a four byte Read or Write command to access the first word in a block, use the addresses shown

in the table below. Otherwise, the least significant three bits of the address field should include the word

address to be accessed. The 32 byte access is permitted in blocks that contain less than 32 implemented

memory bytes. The extra bytes will be returned as zero on a read and ignored on a Write.

Table 9-8. Data Zone Address Values

Block 0

Block 1

Block 2

Block 3

Slot

Address

Size

Address

Size

Address

Size

Address

Size

0x0000

0x0100

0x0008

0x0108

0x0010

0x0110

0x0018

0x0118

0x0020

0x0120

0x0028

0x0128

0x0030

0x0130

0x0038

0x0138

0x0040

0x0140

0x0240

0x0340

0x0048

0x0148

0x0248

0x0050

0x0150

0x0250

0x0058

0x0158

0x0258

0x0060

0x0160

0x0260

0x0068

0x0168

0x0268

ATECC508A

Security Commands

Datasheet Complete

DS20005927A-page 59

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