TU-X1E (serv.man8). Major IC Informations - Sharp TV Service Manual (repair manual). Page 22

TU-X1E/RU

7 – 22

62

I2C_SCL2

i

Secondary I2C Interface Clock

63

I2S_CL

I

I2S Clock

64

I2S_DA

I/O

I2S Data

17

VCC

-

8 to 15 V IC DC-DC power supply.

16

VCC-L

 -

8 to 15 V analog power supply.

6

LX

 -

Integrated N-Channel power MOSFET drain.

22

VUP

-

Input of the linear post-regulator. 
The voltage on this pin is monitored by the internal step-up controller to keep a minimum dropout across 
the linear pass transistor.

19

VoRX

O

Output of the integrated low drop linear post-regulator. 
See truth tables for voltage selections and description.

20

VoTX

O

TX Output to the LNB. 
See truth tables for selection.

8

SDA

I/O

Bi-directional data from/to I2C bus.

9

SCL

 I

Clock from I2C bus.

12

DSQIN

I

This pin will accept the DiSEqC code from the main microcontroller. 
The LNBH23 will use this code to modulate the internally generated 22 kHz carrier. 
Set to ground if not used. 

14

TTX

I

1

DETIN

I

22 kHz tone decoder Input, must be AC coupled to the DiSEqC 2.0 bus.

11

DSQOUT

O

Open drain output of the tone decoder to the main microcontroller for DiSEqC 2.0 data decoding. 
It is LOW when tone is detected on DETIN pin.

13

EXTM

I

External modulation logic input pin which activates the 22kHz tone output on the VoTX pin. 
Set to ground if not used.

15

BYP

I

Needed for internal pre-regulator filtering. The BYP pin is intended only to connect an external ceramic 
capacitor. 
Any connection of this pin to external current or voltage sources may cause permanent damage to the 
device.

10

ADDR

 I

Two I?C bus addresses available by setting the Address pin level voltage. 

23

ISEL

 -

The resistor “RSEL” connected between ISEL and GND defines the linear regulator current limit threshold 
by the equation: Imax(typ.)=10000/ RSEL.

2

VCTRL

 -

13V-18V linear regulator VoRX switch control. To be used only with VSEL=1. 
If VCTRL=1 or floating VoRX=18.5V (or 19.5V if LLC=1). If VCTRL=0 than VoRX=13.4V (LLC=either 0 or 
1).
Leave floating if not used. Do not connect to ground if not used.

7

P-GND

 -

DC-DC converter power ground.

Epad

Epad

-

To be connected with power grounds and to the ground layer through vias to dissipate the heat.

18

A-GND

-

Analog circuits ground.

3,4,5,21,

24

N.C.

-

Not internally connected pins.