DS2431P+T&R Maxim Integrated Products, DS2431P+T&R Datasheet - Page 7

• Manufacturer Part Number: DS2431P+T&R
• Description: IC EEPROM 1KBIT 6TSOC
• Manufacturer: Maxim Integrated Products

Specifications of DS2431P+T&R

• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Memory Size: 1K (256 x 4)
• Interface: 1-Wire Serial
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 6-TSOC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Speed: -

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 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 individu-
Figure 4. 1-Wire CRC Generator
Figure 5. Memory Map
* 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)
—
R
STAGE
3RD
Memory Access
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
POLYNOMIAL = X
1024-Bit, 1-Wire EEPROM
X
4
8
+ X
5
STAGE
ally set to open (unprotected), write protected, or
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 4 protection control bytes, a copy-protection byte,
the factory byte, and 2 user byte/manufacture ID bytes.
The manufacturer ID can be a customer-supplied iden-
tification code that assists the application software in
identifying the product the DS2431 is associated with.
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 0080h: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
7