DS1921 DALLAS [Dallas Semiconductor], DS1921 Datasheet - Page 19

• Manufacturer Part Number: DS1921
• Description: High-Resolution Thermochron iButton
• Manufacturer: DALLAS [Dallas Semiconductor]

MEMORY/CONTROL FUNCTION FLOW CHART Figure 10-2
From Figure 10
To Figure 10
1
1
st
st
RX "1"s
Part
Part
Master
N
N
DS1921 Copies Scratchpad
TA1 (T7:T0), TA2 (T15:T8)
Data to Memory
DS1921 TX "0"
DS1921 TX "1"
Code Match?
Authorization
DS1921 sets
Scratchpad
EMCLR = 0
TX Reset?
TX Reset?
Master TX
Master TX
Finished
E/S Byte
Copying
AA = 1
Master
Master
Copy
55H
Y
Y
N
Y
Y
Y
N
N
TX Reset?
RX "1"s
Master
Master
Y
19 of 44
N
ments Address
DS1921 Incre-
Counter
N
TA1 (T7:T0), TA2 (T15:T8)
Y
from Memory Address
DS1921 sets Memory
Master RX Data Byte
Address = (T15:T0)
Master RX "0"s
DS1921 sets
EMCLR = 0
TX Reset?
Master TX
Memory?
Memory
Master
End of
Read
F0H
N
Y
Y
From Figure 10
To Figure 10
N
3
3
rd
rd
Part
Part
DS1921H/Z