Pin no.
Symbol
Function
1
CS0
Chip select pin. Chip is selected when CS0=L. When chip is not selected, D[0:7] will be in high impedance.
2
RST
External reset pin, low active. If RST not used, connect to VDD
3
CD
Display/control data select “H”:display data ; “L”:control data
4
WR0
In serial mode, these pins are not used, connect to VSS. In parallel mode, functions following table:
I/O type
BM[1:0] (8080 I/O)
BM[1:1] ( 6800 I/O)
/WR
R/W
WR1
/RD
E
5
6
D0
Bi-directional bus for both serial and parallel interfaces. In serial mode, connect D[6] to SCK, D[7] to SDA.
BM=1X
(8 bit)
BM=0X
(SPI)
--
D1
D2
D3
D4
D5
D6
SCK
D7
SDA
Unused pins should be connected to VSS or VDD
7
8
9
10
11
12
13
14
VDD
Power supply, +3.3V.
15
VSS
Power supply, 0V.
16
VB0+
LCD bias voltage are generated internally. Connect a 1uF capacitors between VB0+ and VB0-.
17
VB0-
18
VB1+
LCD bias voltage are generated internally. Connect a 1uF capacitors between VB1+ and VB1-.
19
VB1-
20
VLCD
Internal DC/DC converter output voltage pin. Connect a 1uF capacitor between this pin and Vss for voltage de-coulping
21
BM0
Bus mode: The interface bus mode is determined by BM[1:0] and {DB7,DB6} by the following relationship :
BM[1:0]
{D7, D6}
Mode
Data
6800 I/O
8080 I/O
0X
SDA, SCK
4-wire SPI I/O
22
BM1
A
A(LED+)
Anode of LED backlight
K
K(LED-)
Cathode of LED backlight (0V)
