DS1972-F3 MAXIM [Maxim Integrated Products], DS1972-F3 Datasheet - Page 11

• Manufacturer Part Number: DS1972-F3
• Description: 1024-Bit EEPROM iButton
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 7-3. Memory Function Flow Chart (continued)
From Figure 7
To Figure 7
2
2
nd
nd
Part
Part
TA1 (T7:T0), TA2 (T15:T8)
Bus Master TX
Copy Scratch-
and E/S Byte
Bus Master
Auth. Code
TX Reset ?
Match ?
RX “1”s
N
Master
Pad ?
55h
Y
Y
* 1-Wire idle high for power
N
N
Y
11 of 23
Applicable to all R/W
memory locations.
Duration: t
< 0090h ?
T15:T0
N
PROG
N
Y
Y
DS1972 copies Scratch-
Y
pad Data to Address
DS1972 TX “0”
DS1972 TX “1”
Protected ?
TX Reset ?
TX Reset ?
PF = 0 ?
AA = 1
Master
Master
Copy-
From Figure 7
Y
Y
N
To Figure 7
N
4
4
th
th
Part
Part
N
*