DS2431/T&R Maxim Integrated, DS2431/T&R Datasheet - Page 10

• Manufacturer Part Number: DS2431/T&R
• Description: EEPROM
• Manufacturer: Maxim Integrated

Specifications of DS2431/T&R

• Memory Size: 1 Kbit
• Organization: 4 Pages x 256
• Data Retention: 40 Years
• Operating Supply Voltage: 3.3 V, 5 V
• Maximum Operating Temperature: + 85 C
• Package / Case: TO-92
• Interface Type: 1-Wire Serial
• Minimum Operating Temperature: - 40 C
• Supply Voltage - Max: 5.25 V
• Supply Voltage - Min: 2.8 V

1024-Bit, 1-Wire EEPROM
DS2431
Figure 7a. Memory Function Flowchart
10
INCREMENTS
BUS MASTER
DS2431
Rx "1"s
E[2:0]
N
N
AND DATA BYTES AS THEY
BUS MASTER Tx MEMORY
TA1 (T[7:0]), TA2 (T[15:8])
WERE SENT BY THE BUS
MASTER Tx DATA BYTE
COMMAND, ADDRESS,
FUNCTION COMMAND
DS2431 Tx CRC-16 OF
WRITE SCRATCHPAD?
SETS E[2:0] = T[2:0]
MASTER Tx RESET?
MASTER Tx RESET?
TO SCRATCHPAD
BUS MASTER Tx
CLEARS AA = 0
SETS PF = 1
E[2:0] = 7?
T[2:0] = 0?
MASTER
DS2431
PF = 0
0Fh
FLOWCHART (FIGURE 9)
Y
N
Y
Y
Y
TO ROM FUNCTIONS
N
Y
N
APPLIES ONLY
IF THE MEMORY
AREA IS NOT
PROTECTED.
IF WRITE PROTECTED,
THE DS2431 COPIES
THE DATE BYTE FROM
THE TARGET ADDRESS
INTO THE SCRATCHPAD.
IF IN EPROM MODE,
THE DS2431 LOADS
THE BITWISE LOGICAL
AND OF THE TRANSMITTED
BYTE AND THE DATA
BYTE FROM THE TARGETED
ADDRESS INTO THE
SCRATCHPAD.
FLOWCHART (FIGURE 9)
FROM ROM FUNCTIONS
BYTE COUNTER
INCREMENTS
BUS MASTER
DS2431
Rx "1"s
N
N
E/S BYTE, AND DATA BYTES
TA1 (T[7:0]), TA2 (T[15:8]),
OF COMMAND, ADDRESS,
BUS MASTER Rx CRC-16
AS SENT BY THE DS2431
BYTE COUNTER = T[2:0]
READ SCRATCHPAD?
MASTER Tx RESET?
MASTER Tx RESET?
DATA BYTE FROM
BUS MASTER Rx
BUS MASTER Rx
BYTE COUNTER
AND E/S BYTE
SCRATCHPAD
SCRATCHPAD
DS2431 SETS
= E[2:0]?
AAh
Y
N
Y
Y
N
Y
FROM FIGURE 7b
TO FIGURE 7b
Maxim Integrated