Lcd Interface; Matrix Keyboard Interface - Quectel EC200U Series Hardware Design

3.15. LCD Interface

The LCD interface of the module supports a liquid crystal display with a maximum resolution of 320 × 240
and DMA transmission, 16-bit RGB565 and YUV formats.
Table 22: Pin Definition of LCD Interface
Pin Name Pin No.
LCD_FMARK 119
LCD_RSTB 120
LCD_SEL 121
LCD_CS 122
LCD_CLK 123
LCD_SDC 124
LCD_SI/O 125
ISINK 140

3.16. Matrix Keyboard Interface

The module provides one keyboard interface. It supports 4 × 4 matrix keyboard.
Table 23: Pin Definition of Matrix Keyboard Interface
Pin Name Pin No.
USB_BOOT 115
EC200U_Series_Hardware_Design
I/O Description
LCD frame
DI
synchronization
DO LCD reset
- Reserved
DO LCD chip select
DO LCD clock
DO LCD register selection
DIO LCD data
Sink current input.
PI
Backlight adjustment
I/O Description
DI Matrix keyboard input0
LTE Standard Module Series
Comment
1.8 V power domain.
If unused, keep them open.
Imax = 200 mA
It is driven by the current
sink method, and connected
to the backlight cathode, the
brightness can be adjusted
with current control.
Comment
1.8 V power domain.
If unused, keep it open.
The USB_BOOT cannot be
pulled up before startup and
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