LTE Standard Module Series
EC200U_Series_Hardware_Design 49 / 94
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.
I/O
Description
Comment
LCD_FMARK
119
DI
LCD frame
synchronization
1.8 V power domain.
If unused, keep them open.
LCD_RSTB
120
DO
LCD reset
LCD_SEL
121
-
Reserved
LCD_CS
122
DO
LCD chip select
LCD_CLK
123
DO
LCD clock
LCD_SDC
124
DO
LCD register selection
LCD_SI/O
125
DIO
LCD data
ISINK
140
PI
Sink current input.
Backlight adjustment
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.
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.
I/O
Description
Comment
USB_BOOT
115
DI
Matrix keyboard input0
1.8 V power domain.
If unused, keep it open.
The USB_BOOT cannot be
pulled up before startup and
