MAX16816 Maxim Integrated Products, MAX16816 Datasheet - Page 27

• Manufacturer Part Number: MAX16816
• Description: Programmable Switch-Mode LED Driver
• Manufacturer: Maxim Integrated Products

There are two types of write time slots: Write-1 time
slots and Write-0 time slots. The bus master uses a
Write-1 time slot to write a logic ‘1’ to the MAX16816
and a Write-0 time slot to write a logic ‘0’. All write time
slots must be a minimum of 60µs in duration with a min-
imum of a 1µs recovery time between individual Write
slots. Both types of write time slots are initiated by the
master pulling the 1-Wire bus low (Figures 7 and 8).
To generate a Write-1 time slot, the bus master must
release the 1-Wire bus within 15µs after pulling the bus
Figure 7. 1-Wire Write-1 Time Slot
Figure 8. 1-Wire Write-0 Time Slot
V
V
V
V
OH
0V
OH
0V
IL
OL
______________________________________________________________________________________
Programmable Switch-Mode LED Driver
with Analog-Controlled PWM Dimming
RESISTOR
RESISTOR
t
W1L
Write Time Slots
t
W0L
SAMPLING
MAX16816
WINDOW
t
t
SLOT
MASTER
SLOT
MASTER
low. When the bus is released, the pullup resistor will
pull the bus high. To generate a Write-0 time slot, the
bus master must continue to hold the bus low for the
duration of the time slot (at least 60µs) after pulling the
1-Wire bus low. The MAX16816 samples the 1-Wire bus
during a window that lasts from 15µs to 60µs after the
master initiates the Write time slot. If the bus is high
during the samples window, a ‘1’ is written to the
MAX16816. If the line is low, a ‘0’ is written to the
MAX16816.
MAX16816
SAMPLING
WINDOW
t
REC
t
REC
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