TLC59116 Datasheet, PDF (20/30 Pages) Texas Instruments – 16-CHANNEL Fm+ I2C-BUS CONSTANT-CURRENT LED SINK DRIVER

TLC59116
SLDS157A – FEBRUARY 2008 – REVISED APRIL 2008 .................................................................................................................................................. www.ti.com
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 I²C bus command.
The SWRST Call function is defined as the following:
1. A Start command is sent by the I²C bus master.
2. The reserved SWRST I²C bus address 1101 011 with the R/W bit set to 0 (write) is sent by the I²C bus
master.
3. The TLC59116 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.
4. Once the SWRST Call address has been sent and acknowledged, the master sends two bytes with two
specific values (SWRST data byte 1 and byte 2):
a. Byte1 = A5h: the TLC59116 acknowledges this value only. If byte 1 is not equal to A5h, the TLC59116
does not acknowledge it.
b. Byte 2 = 5Ah: the TLC59116 acknowledges this value only. If byte 2 is not equal to 5Ah, the TLC59116
does not acknowledge it.
If more than two bytes of data are sent, the TLC59116 does not acknowledge any more.
5. Once the correct two 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 TLC59116 then resets to
the default value (power-up value) and is ready to be addressed again within the specified bus free time
(t_BUF).
The I²C bus master may interpret a non-acknowledge from the TLC59116 (at any time) as a SWRST Call Abort.
The TLC59116 does not initiate a reset of its registers. This happens only when the format of the Start Call
sequence is not correct.
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 the individual
brightness for each LED.
On top of this signal, one of the following signals can be superimposed (this signal can be applied to the four
LED outputs):
• A lower 190-Hz fixed-frequency signal with programmable duty cycle (8 bits, 256 steps) provides a global
brightness control.
• A programmable frequency signal from 24 Hz to 1/10.73 s (8 bits, 256 steps) provides a global blinking
control.
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