Waveshare e-Paper - Page 9

4inch e-Paper
User Manual
6
NO.
Type
Name
Description
34
I/O
SI1
Serial data pin, reserved
35
I/O
SI2
Serial data pin, reserved
36
I/O
SI3
Serial data pin, reserved
37
P
VDDDO
Core logic power pin, Connect to VDDO
38
P
VDD
Supply voltage
39
P
GND
Ground, Connect to GNDA
40
P
VDDIO
Supply voltage
41
P
VCP2
Charge Pump Pin
42
P
CP2N
Charge Pump Pin
43
P
CP2P
Charge Pump Pin
44
P
VCP1
Charge Pump Pin
45
P
CP1N
Charge Pump Pin
46
P
CP1P
Charge Pump Pin
47
CGH1N
Charge Pump Pin, Reserved
48
CGH1P
Charge Pump Pin, Reserved
49
P
VGH
Positive Gate driving voltage
50
P
VCOMBD
VCOMBD driving voltage
Note 5-1: This pin (CS#) is the chip select input connecting to the MCU. The chip is enabled for MCU
communication only when CS# is pulled LOW.
Note 5-2: This pin is (D/C#) Data/Command control pin connecting to the MCU. When the pin is pulled
HIGH, the data will be interpreted as data. When the pin is pulled LOW, the data will be
interpreted as command.
Note 5-3: This pin (RES#) is reset signal input. The Reset is active low.
Note 5-4: This pin (Busy_N) is Busy state output pin. When Busy is Low, the operation of chip should
not be interrupted and any command should not be issued to the module. The driver IC
would put Busy pin Low when the driver IC is working such as:
-Outputting display waveform; or
-Programming with OTP
-Communicating with digital temperature sensor