DS28CN01U+ MAXIM [Maxim Integrated Products], DS28CN01U+ Datasheet - Page 4

• Manufacturer Part Number: DS28CN01U+
• Manufacturer: MAXIM [Maxim Integrated Products]

PIN DESCRIPTION
OVERVIEW
The DS28CN01 features a serial I²C/SMBus interface, 1Kbits of SHA-1 secure EEPROM, a register page, and a
unique registration number, as shown in the Block Diagram. The device communicates with a host processor
through its I²C interface in Standard-mode or in Fast-mode. The user can switch the interface from I²C Bus to
SMBus Mode. Two 4-level address pins allow 16 DS28CN01s to reside on the same bus segment.
DS28CN01 BLOCK DIAGRAM
PIN
3, 7
1
2
4
5
6
8
NAME
GND
N.C.
SDA
AD0
AD1
SCL
V
CC
SDA
ADx
SCL
V
CC
Device Address Input Pin to Select the Slave Address. Sets slave address bits A1:A0;
must be tied to either GND, SDA, SCL, or V
Device Address Input Pin to Select the Slave Address. Sets slave address bits A3:A2;
must be tied to either GND, SDA, SCL, or V
No Connection
Ground Supply
I²C/SMBus Bidirectional Serial Data Line. Must be tied to V
I²C/SMBus Serial Clock Input. Must be tied to V
Power-Supply Input
I²C/SMBus
Function
Control
SHA-1 Engine
MAC Output
Memory and
Comparator
Write Buffer
Control
8-Byte
Buffer
MAC
4 of 9
FUNCTION
CC
CC
.
.
CC
through a pullup resistor.
User EEPROM
64-bit Unique
of 32 Bytes
Register
Number
Memory
4 Pages
CC
Engine
SHA-1
Secret
Page
through a pullup resistor.