Pin no.
Symbol
Function
1
CS0
Chip select pin. Chip is selected when CS0=L (CS1=H hardwired internally)
In I2C mode, UC1601's device address pin A2=CS0, A3=1.
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[0] to SCK, D[3] to SDA.
BM=1X
(8 bit)
BM=00
(S8)
BM=01
(S9)
(I2C)
SCK
D1
--
D2
D3
SDA
D4
D5
D6
0
D7
Unused pins should be connected to VSS or VDD
7
8
9
10
11
12
13
14
BM0
Bus mode: The interface bus mode is determined by BM[1:0] and {DB7,DB6} by the following relationship:
BM[1:0]
{DB7, DB6}
Mode
Data
6800 I/O
8080 I/O
00
4-wire SPI w/8-bit token(S8:conventional)
01
3-wire SPI w/9-bit token(S9:conventional)
2-wire serial (I2C)
15
BM1
16
VDD
Power supply, +3.3V.
17
VSS
Power supply, 0V . Connect VSS and VSS2 to the shared GND pin
18
VB01+
LCD bias voltage are generated internally. Connect a 1uF capacitors between C1+ and C1-, C2+ and C2-.
19
VB01-
20
VB0-
21
VB0+
22
VLCD
Internal DC/DC converter output pin, need to connect a 1uF capacitor between VSS and this pin for voltage decoupling
23
BL-A
Anode of LED backlight (+4.1V, LEDs in parallel connection)
24
BL-K
Cathode of LED backlight (0V)
