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TLC59116FIPWR Datasheet(PDF) 10 Page - Texas Instruments

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Part # TLC59116FIPWR
Description  16-Channel Fast-Mode Plus I2C Bus LED Driver
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TLC59116FIPWR Datasheet(HTML) 10 Page - Texas Instruments

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TLC59116F
SCLS714C – MARCH 2009 – REVISED SEPTEMBER 2015
www.ti.com
8.3 Feature Description
8.3.1 Power-On Reset (POR)
When power is applied to VCC, an internal power-on reset holds the TLC59116F in a reset condition until VCC
reaches VPOR. At this point, the reset condition is released and the TLC59116F registers and I
2C bus state
machine are initialized to their default states causing all the channels to be deselected. Thereafter, VCC must be
lowered below 0.2 V to reset the device.
8.3.2 External Reset
A reset can be accomplished by holding the RESET pin low for a minimum of tW. The TLC59116F registers and
I2C state machine will be held in their default state until the RESET input is once again high.
This input requires a pullup resistor to VCC if no active connection is used.
8.3.3 Software Reset
The software reset call (SWRST Call) allows all the devices in the I2C bus to be reset to the power-up state value
through a specific formatted I2C bus command. To be performed correctly, it implies that the I2C bus is functional
and that there is no device hanging the bus.
The SWRST Call function is defined as the following:
A START command is sent by the I2C bus master.
The reserved SWRST I2C bus address '1101 011' with the R/W bit set to '0' (write) is sent by the I2C bus
master.
The TLC59116F device(s) acknowledge(s) after seeing the SWRST Call address '1101 0110' (D6h) only. If
the R/W bit is set to '1' (read), no acknowledge is returned to the I2C bus master.
Once the SWRST Call address has been sent and acknowledged, the master sends 2 bytes with 2 specific
values (SWRST data byte 1 and byte 2):
a. Byte1 = A5h: the TLC59116F acknowledges this value only. If byte 1 is not equal to A5h, the TLC59116F
does not acknowledge it.
b. Byte 2 = 5Ah: the TLC59116F acknowledges this value only. If byte 2 is not equal to 5Ah, the TLC59116F
does not acknowledge it.
If more than 2 bytes of data are sent, the TLC59116F does not acknowledge any more.
Once the right 2 bytes (SWRST data byte 1 and byte 2 only) have been sent and correctly acknowledged, the
master sends a STOP command to end the SWRST Call: the TLC59116F then resets to the default value
(power-up value) and is ready to be addressed again within the specified bus free time (tBUF).
The I2C bus master must interpret a non-acknowledge from the TLC59116F (at any time) as a SWRST Call
Abort. The TLC59116F does not initiate a reset of its registers. This happens only when the format of the START
Call sequence is not correct.
8.3.4 Individual Brightness Control With Group Dimming/Blinking
A 97-kHz fixed frequency signal with programmable duty cycle (8 bits, 256 steps) is used to control individually
the brightness for each LED.
On top of this signal, one of the following signals can be superimposed (this signal can be applied to the 4 LED
outputs):
A lower 190-Hz fixed frequency signal with programmable duty cycle (8 bits, 256 steps) is used to provide a
global brightness control.
A programmable frequency signal from 24 Hz to 1/10.73 s (8 bits, 256 steps) is used to provide a global
blinking control.
10
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Product Folder Links: TLC59116F


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