DS1922T-F5 MAXIM [Maxim Integrated Products], DS1922T-F5 Datasheet - Page 28

• Manufacturer Part Number: DS1922T-F5
• Description: Temperature Logger iButton With 8kB Datalog Memory
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 9-1. Memory/Control Function Flow Chart
ments Scratch-
DS1922 Incre-
pad Offset
N
Y
Y
Command, Address Data
Master TX Memory or
Control Fkt. Command
DS1922 sets Scratch-
Master TX Data Byte
DS1922 sets (E4:E0)
to Scratchpad Offset
pad Offset = (T4:T0)
Master RX CRC16 of
and Clears (PF, AA)
= Scratchpad Offset
Master RX "1"s
TA2 (T15:T8)
pad Offset =
TA1 (T7:T0)
Scratchpad
TX Reset?
TX Reset?
TX Reset?
Master TX
Master TX
11111b?
Scratch-
Master
Master
Master
Write
0FH
N
Y
N
N
Y
Byte Written?
Y
N
Partial
N
28 of 50
Flow Chart (Figure 11)
From ROM Functions
PF = 1
Y
ments Scratch-
DS1922 Incre-
pad Offset
Flow Chart (Figure 11)
N
Y
To ROM Functions
E/S Byte, and Data Starting
Command, Address Data,
from Scratchpad Offset
DS1922 sets Scratch-
Master RX Data Byte
at the Target Address
pad Offset = (T4:T0)
Master RX CRC16 of
Master RX Ending
Offset with Data
Master RX "1"s
TA2 (T15:T8)
pad Offset =
TA1 (T7:T0)
Status (E/S)
Scratchpad
TX Reset?
TX Reset?
Master RX
Master RX
11111b?
Scratch-
Master
Master
Read
AAH
N
Y
N
Y
From Figure 9
N
Y
DS1922L/DS1922T
To Figure 9
2
2
nd
nd
Part
Part