DS1993 Maxim, DS1993 Datasheet - Page 8

• Manufacturer Part Number: DS1993
• Description: The DS1992/DS1993 memory iButtons (hereafter referred to as DS199_) are rugged read/write data carriers that act as a localized database, easily accessible with minimal hardware
• Manufacturer: Maxim

Figure 6. MEMORY FUNCTIONS FLOW CHART (continued)
From Figure 6
First Part
To Figure 6
First Part
N
Scratchpad Data
Bus Master TX
DS199x Copies
Bus Master TX
Bus Master TX
DS199x TX "1"s
DS199x TX "0"s
TA2 (T15:T8)
TA1 (T7:T0)
Code Match
To Memory
Authorization
Scratchpad
E/S Byte
Bus Master
TX Reset
AA = 1
Copy
55H
?
?
?
Y
Y
Y
N
N
Bus Master
TX Reset
?
Y
8 of 17
N
Address Counter
Increments
DS199x
DS199x sets Memory
Y
N
Memory Address
Address = (T15:T0)
Master RX Data
Bus Master TX
Bus Master TX
TA2 (T15:T8)
N
TA1 (T7:T0)
Read Memory
Bus Master
Byte From
Bus Master
TX Reset
RX "1"s
= 21Dh ?
Address
Memory
F0H
?
?
Y
N
Y
DS1992/DS1993