TDP158 datasheet(22/55 Pages) TI1

22 / 55 page

IN_CLKp

IN_CLKn

IN_D[2:0]p

IN_D[2:0]n

SIGNAL

DETECT

Control Block, I2C Registers

Local

I2C

Control

I2C_EN

A0/EQ1

VBIAS

EQ1

OUT_CLKp

OUT_D[2:0]p

OUT_CLKn

OUT_D[2:0]n

EQ_CTL

SDA_CTL/PRE

SCL_CTL/SWAP

VSADJ

TERM

SLEW

A1/EQ2

MODE_TERM

SLEW

Enable

TMDS

SIG_DET_

OUT

SIG_DET_OUT

ACTIVE DDC BLOCK

HPD_SNK

HPD_SRC

190

.Ÿ

SDA_SRC

SCL_SRC

SDA_SNK

SCL_SNK

DDC Snoop Block

GND

VDD

VCC

1.1 V

3.3 V

VREG

EQ2

Enable

SDA

SCL

PRE

SWAP

TDP158

SLLSEX2 – DECEMBER 2016

www.ti.com

Submit Documentation Feedback

8.2 Functional Block Diagram

8.3 Feature Description

8.3.1 Reset Implementation

When OE is low, Control signal inputs are ignored; the HDMI inputs and outputs are high impedance. It is critical

to transition the OE from a low level to high after the VCC supply has reached the minimum recommended

operating voltage. This is achieved by a control signal to the OE input, or by an external capacitor connected

between OE and GND. To insure the TDP158 is properly reset, the OE pin must be de-asserted for at least 100

μs before being asserted. When OE is re-asserted the TDP158 must be reprogrammed if it was programmed by

I2C and not pin strapping. When implementing the external capacitor, the size of the external capacitor depends

on the power up ramp of the VCC supply, where a slower ramp-up results in a larger value external capacitor.

Refer to the latest reference schematic for TDP158; consider approximately 0.1 µF capacitor as a reasonable

first estimate for the size of the external capacitor. Both OE implementations are shown in Figure 20 and

Figure 21.

TDP158 Datasheet(PDF) 22 Page - Texas Instruments

TDP158 Datasheet(HTML) 22 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55

Datasheet Download

Link URL