DS28EC20 Maxim, DS28EC20 Datasheet - Page 22

• Manufacturer Part Number: DS28EC20
• Description: The DS28EC20 is a 20480-bit, 1-Wire® EEPROM organized as 80 memory pages of 256 bits each
• Manufacturer: Maxim

Master-to-Slave
For a write-one time slot, the voltage on the data line must have crossed the V
time t
until the write-zero low time t
should not exceed V
DS28EC20 needs a recovery time t
Figure 11. Read/Write Timing Diagram
Write-One Time Slot
Write-Zero Time Slot
Read-Data Time Slot
W1LMAX
V
V
V
IHMASTER
IHMASTER
IHMASTER
is expired. For a write-zero time slot, the voltage on the data line must stay below the V
V
V
V
V
V
V
ILMAX
ILMAX
ILMAX
V
V
V
V
V
V
PUP
PUP
PUP
0V
0V
0V
TH
TH
TH
TL
TL
TL
ILMAX
t
F
t
t
F
F
RESISTOR
RESISTOR
RESISTOR
during the entire t
W0LMIN
t
RL
t
W1L
REC
is expired. For the most reliable communication, the voltage on the data line


before it is ready for the next time slot.
Sampling
W0L
Window
Master
t
W0L
t
or t
MSR
22 of 27
W1L
MASTER
MASTER
MASTER
window. After the V
t
SLOT
t
t
SLOT
SLOT
TH

TH
DS28EC20: 20Kb 1-Wire EEPROM
threshold before the write-one low
threshold has been crossed, the
t
REC
DS28EC20
t
REC
TH
threshold