Touch Panel Interfaces - Quectel SG865W Series Hardware Design

⚫
Use the high voltage output (LCD_BL_A) for powering WLED strings, and the output OVP voltage is
32.5 V.
⚫
Support 4 current sinks (LCD_BL_K1, LCD_BL_K2, LCD_BL_K3, LCD_BL_K4), with maximum sink
current up to 30 mA for each string.
⚫
Power four strings of WLEDs (about 6s4p WLEDs) with four current sink drivers.

4.13. Touch Panel Interfaces

The module provides 2 I2C interfaces for connection with Touch Panel (TP), and provides the
corresponding power supply and interrupt pins. The pin definition of touch panel interfaces is illustrated
below.
Table 28: Pin Definition of Touch Panel Interfaces
Pin Name
TP0_RST
TP0_INT
TP0_I2C_SCL
TP0_I2C_SDA
TP1_RST
TP1_INT
TP1_I2C_SCL
TP1_I2C_SDA
A reference design for TP interfaces is shown below.
SG865W_Series_Hardware_Design
Pin No. I/O
455 DO
449 DI
454 OD
460 OD
421 DO
427 DI
409 OD
415 OD
Description
TP0 reset
TP0 interrupt
TP0 I2C clock
TP0 I2C data
TP1 reset
TP1 interrupt
TP1 I2C clock
TP1 I2C data
Smart Module Series
Comment
1.8 V power domain.
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