Datasheet

4D SYSTEMS µLCD-43
© 2014 4D SYSTEMS Page 6 of 21 www.4dsystems.com.au
I = Input, O = Output, P = Power
J1 Pin Outs (I/O Expansion Header)
Pin
Symbol
I/O
Description
1
IO1
I/O
General Purpose Input Output 1 Pin
2
N/C
-
Not Connected
3
IO2
I/O
General Purpose Input Output 2 Pin
4
SCL
O
I
2
C Clock Output
5
IO3
I/O
General Purpose Input Output 3 Pin
6
SDA
I/O
I
2
C Bidirectional Data
7
IO4/BUS_RD
I/O
General Purpose Input Output 4 Pin / Bus Read
8
N/C
-
Not Connected
9
IO5/BUS_WR
I/O
General Purpose Input Output 5 Pin / Bus Write
10
N/C
-
Not connected
11
GND
P
Supply Ground
12
+5V
P
Supply Input +ve, 4.0V to 5.5V, 5.0V Nominal
13
GND
P
Supply Ground
14
N/C
-
Not connected
15
BUS7
I/O
IO Bus (BUS0..7) bit 7
16
RES
I
Master Reset, Active Low (GND) (Refer J2 Pinout)
17
BUS6
I/O
IO Bus (BUS0..7) bit 6
18
N/C
-
Not connected
19
BUS5
I/O
IO Bus (BUS0..7) bit 5
20
3.3V
I
Regulated 3.3 Volts output, maximum available current 400mA to power
external circuitry.
21
BUS4
I/O
IO Bus (BUS0..7) bit 4
22
N/C
-
Not connected
23
BUS3
I/O
IO Bus (BUS0..7) bit 3
24
RX0
I
Asynchronous serial port 0 receive pin. COM0 (same as the RX pin on the J2
Programming Header)
25
BUS2
I/O
IO Bus (BUS0..7) bit 2
26
TX0
O
Asynchronous serial port 0 transmit pin. COM0 (same as the TX pin on the J2
Programming Header)
27
BUS1
I/O
IO Bus (BUS0..7) bit 1
28
TX1
O
Asynchronous serial port 1 transmit pin. COM1
29
BUS0
I/O
IO Bus (BUS0..7) bit 0
30
RX1
I
Asynchronous serial port 1 receive pin. COM1