Quectel EC200U Series Hardware Design page 28

Matrix Keyboard Interface
Pin Name Pin No.
USB_BOOT 115
KEYIN1 78
KEYIN2 79
KEYIN3 80
KEYOUT0 83
KEYOUT1 84
KEYOUT2 113
KEYOUT3 114
SD Card Interface
Pin Name Pin No.
SD_DET 23
SDIO1_DATA3 28
SDIO1_DATA2 29
SDIO1_DATA1 30
SDIO1_DATA0 31
SDIO1_CLK 32
EC200U_Series_Hardware_Design
Backlight
adjustment
I/O Description
DI Matrix key input0
DI Matrix key input1
DI Matrix key input2
DI Matrix key input3
DO Matrix key output0
DO Matrix key output1
DO Matrix key output2
DO Matrix key output3
I/O Description
DI SD card detect
DIO SDIO data bit 3
DIO SDIO data bit 2
DIO SDIO data bit 1
DIO SDIO data bit 0
DO SDIO clock
LTE Standard Module Series
Configurable current current sink method,
DC Characteristics
DC Characteristics
and connected to the
backlight cathode,
the brightness can
be adjusted with
current control.
Comment
It can be multiplexed
as KEYIN0 after
startup.
1.8 V power domain.
If unused, keep it
open. The KEYIN1
cannot be pulled up
before startup.
1.8 V power domain.
If unused, keep them
open.
Comment
1.8 V power domain.
If unused, keep it
open.
1.8/3.2 V power
domain.
If unused, keep them
open.
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