DS2431-A1 Maxim, DS2431-A1 Datasheet - Page 6

no-image

DS2431-A1

Manufacturer Part Number
DS2431-A1
Description
The DS2431-A1 is an AEC-Q100 Grade 1 qualified version of the DS2431
Manufacturer
Maxim
Datasheet
Data memory and registers are located in a linear
address space, as shown in Figure 5. The data memory
and the registers have unrestricted read access. The
DS2431-A1 EEPROM array consists of 18 rows of 8
bytes each. The first 16 rows are divided equally into
four memory pages (32 bytes each). These four pages
are the primary data memory. Each page can be indi-
vidually set to open (unprotected), write protected, or
1024-Bit, 1-Wire EEPROM
for Automotive Applications
Figure 4. 1-Wire CRC Generator
Figure 5. Memory Map
6
*Once programmed to AAh or 55h this address becomes read-only. All other codes can be stored, but neither write protect the
address nor activate any function.
_______________________________________________________________________________________
X
ADDRESS RANGE
0
0000h to 001Fh
0020h to 003Fh
0040h to 005Fh
0060h to 007Fh
0088h to 008Fh
STAGE
1ST
0080h
0081h
0082h
0083h
0084h
0085h
0086h
0087h
X
1
*
*
*
*
*
STAGE
2ND
X
2
TYPE
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
N/A
R
STAGE
3RD
Data Memory Page 0
Data Memory Page 1
Data Memory Page 2
Data Memory Page 3
Protection Control Byte Page 0
Protection Control Byte Page 1
Protection Control Byte Page 2
Protection Control Byte Page 3
Copy Protection Byte
Factory Byte. Set at Factory.
User Byte/Manufacturer ID
User Byte/Manufacturer ID
Reserved
X
3
STAGE
4TH
DESCRIPTION
Memory
POLYNOMIAL = X
X
4
8
+ X
5
STAGE
EPROM mode by setting the associated protection byte
in the register row. The last two rows contain protection
registers and reserved bytes. The register row consists
of four protection control bytes, a copy protection byte,
the factory byte, and two user byte/manufacture ID
bytes. The manufacturer ID can be a customer-sup-
plied identification code that assists the application
software in identifying the product the DS2431-A1 is
associated with. Contact the factory to set up and reg-
5TH
+ X
4
+ 1
55h: Write Protect P0; AAh: EPROM Mode P0; 55h
or AAh: Write Protect 80h
55h: Write Protect P1; AAh: EPROM Mode P1; 55h
or AAh: Write Protect 81h
55h: Write Protect P2; AAh: EPROM Mode P2; 55h
or AAh: Write Protect 82h
55h: Write Protect P3; AAh: EPROM Mode P3; 55h
or AAh: Write Protect 83h
55h or AAh: Copy Protect 0080:008Fh, and Any
Write-Protected Pages
AAh: Write Protect 85h, 86h, 87h;
55h: Write Protect 85h, Unprotect 86h, 87h
X
5
PROTECTION CODES
STAGE
6TH
X
6
STAGE
7TH
X
INPUT DATA
7
STAGE
8TH
X
8

Related parts for DS2431-A1