AS3955 datasheet(28/111 Pages) AMSCO

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[v1-01] 2015-Apr-29

AS3955 − Detailed Description

2kbit EEPROM Organization

Numbers of dynamic lock bits:

• Data area size in bytes:

4*(63 – 3) – 3 – 21 = 216 bytes

• Number of dynamic lock bits:

(200 – 48) / 8 = 21 bits (21 bits)

Figure 28:

2kbit EEPROM Organization

Note(s) and/or Footnote(s):

1. Bits that are not used should be set to 0.

Access properties:

RO: Read only, writing to this word is not possible

RW: Reading and writing to this word is possible

OTP: One time programmable. A bit of this word once set to 1 cannot be set back to 0.

Byte Number in Block

Block

Description

Access

Byte number in block

Block

Description

Access

00h

UID0

UID1

UID2

UID3

UID / Internal

01h

FAB_CFG0

FAB_CFG1

FAB_CFG2

FAB_CFG3

Fabrication data

02h

Internal 8

Internal 9

Lock 0

Lock 1

Internal / Lock

OTP

03h

CC 0

CC 1

CC 2

CC 3

OTP

04h

Data 0

Data 1

Data 2

Data 3

Data

05h

Data 4

Data 5

Data 6

Data 7

Data

06h

Data 8

Data 9

Data 10

Data 11

Data

07h

39h

Data

3Ah

Lock 2

Lock 3

Lock 4

Lock 5

Lock

OTP

3Bh

Lock 6

Lock 7

Lock 8 (1)

Reserved 0

Lock / Reserved

OTP

3Ch

RFP0

RFP1

RFP2

RFP3

Authentication

password

3Dh

CHIP_KILL

AUTH_CNT

AUTH_LIM

AUTH_CFG

Authentication

settings

3Eh

SENSR1

SENSR2

SELR

IC_CFG0

Config. block 0

3Fh

IC_CFG1

IC_CFG2

MIRQ_0

MIRQ_1

Config. block 1

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