Datasheet

DS28EC20: 20Kb 1-Wire EEPROM
20 of 27
Figure 9-2. ROM Functions Flowchart (continued)
From Figure 9,
1
st
Part
From Figure 9,
1
st
Part
To Figure 9, 1
st
Part
RC = 1 ?
N
Y
RC = 0 ; OD = 1
Master TX Bit 0
Master TX Bit 63
Master TX Bit 1
RC = 1
Bit 0
Match?
Y
N
Bit 1
Match?
Y
N
Bit 63
Match?
Y
N
Y
N
69h
Overdrive Match
ROM?
RC = 0 ; OD = 1
Master
TX Reset ?
Y
N
Master
TX Reset ?
N
Y
Y
N
3Ch
Overdrive
Skip ROM?
Y
N
A5h
Resume
Command?
To Figure 9,
1
st
Part
OD = 0
OD = 0
OD = 0
1)
1)
1)
1) The OD flag remains at 1 if the device was already at overdrive
speed before the Overdrive Match ROM command was issued.
NOTE: For operation at overdrive speed, the DS28EC20 requires V
PUP
to be 5V ±5%.