ds2423 Maxim Integrated Products, Inc., ds2423 Datasheet - Page 9

• Manufacturer Part Number: ds2423
• Description: Ds2423 4kbit 1-wire Ram With Counter
• Manufacturer: Maxim Integrated Products, Inc.

MEMORY FUNCTION FLOW CHART Figure 7
1) To be transmitted or received at Overdrive speed if OD = 1.
2) Reset Pulse to be transmitted at Overdrive speed if OD = 1.
ments Scratch-
DS2423 Incre-
Reset Pulse to be transmitted at normal speed if OD = 0 or if
the DS2423 is to be reset from Overdrive speed to regular
speed.
pad Offset
N
Y
Y
Command, Address, Data
DS2423 sets Scratch-
Master TX Data Byte
DS2423 sets (E4:E0)
to Scratchpad Offset
pad Offset = (T4:T0)
Master RX CRC16 of
and Clears (PF, AA)
= Scratchpad Offset
Function Command
Master TX Memory
Master RX "1"s
pad Offset =
TA2 (T15:T8)
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
2)
2)
2)
1)
Byte Written?
Y
N
1)
1)
1)
1)
1)
Partial
N
9 of 25
From ROM Functions
Flow Chart (Figure 9)
PF = 1
Y
ments Scratch-
DS2423 Incre-
pad Offset
Flow Chart (Figure 9)
To ROM Functions
N
from Scratchpad Offset
DS2423 sets Scratch-
Master RX Data Byte
pad Offset = (T4:T0)
Master RX Ending
Offset with Data
Master RX "1"s
pad Offset =
TA1 (T7:T0)
Status (E/S)
Scratchpad
TA2 (T15:T8)
TX Reset?
Master RX
Master RX
11111b?
Scratch-
Master
Read
AAH
N
Y
Y
2)
From Figure 7
To Figure 7
1)
N
2
2
1)
Y
nd
1)
nd
1)
Part
Part
1)