EAEDIP128B-6LW Datasheet, PDF (4/29 Pages) List of Unclassifed Manufacturers – OPERATING UNIT 128x64 with touch panel

EA eDIP128-6
Page 4
ELECTRONIC ASSEMBLY reserves
the right to change specifications
without prior notice. Printing and
typographical errors reserved.
RS-232 INTERFACE
If the display is wired as shown
below, the RS-232 interface is
selected. The pin assignment is
specified in the table on the right.
The RxD and TxD lines lead
CMOS level (VDD) to a
microcontroller, for example, for
direct connection.
If “genuine” RS-232 levels are
required (e.g. for connection to a
PC), an external level converter
(e.g. MAX232) is required.
Pinout eDIP128-6: RS-232/RS-485 mode
Pin Symbol In/Out Function
Pin Symbol In/Out Function
1 GND
Ground Potential for logic (0V)
17 DPROT
In
L: Disable Smallprotokoll
do not connect for normal operation
2 VDD
Power supply for logic (+3,3V..5V)
18 PWR
Out
L: Normal Operation
H: Powerdownmode
3 NC
do not connect
19 NC
do not connect
4 NC
do not connect
20
TEST
SBUF
In
Out
open-drain with internal pullup 20k..50k
IN (Power-On) L: Testmode
OUT L: data in sendbuffer
5 RESET In L: Reset
21 GND
Ground (0V)
6 BAUD0 In Baud Rate 0
22 VDD
Power supply (+3,3..5V)
7 BAUD1 In Baud Rate 1
23 NC
do not connect
8 BAUD2 In Baud Rate 2
24 NC
do not connect
9 ADR0 In Address 0 for RS-485
25 IN8/OUT1
10 RxD
11 TxD
12 EN485
In Receive Data
Out Transmit Data
Out Transmit Enable for RS-485 driver
26 IN7/OUT2
27 IN6/OUT3
28 IN5/OUT4
8 digital inputs
(internal 20k..50k pullup)
13 WUP
14 ADR1
15 ADR2
In
L: (Power-On) disable Power-On-Macro
L: Wakeup from Powerdownmode
In Address 1 for RS-485
In Address 2 for RS-485
29 IN4/OUT5
30 IN3/OUT6
31 IN2/OUT7
alternativ up to 8 digital outputs
maximum current:
IOL = IOH = 10mA
16 BUZZ Out Buzzer output
32 IN1/OUT8
BAUD RATES
The baud rate is set by means of pins 6, 7 and 8 (baud 0 to 2). The data
format is set permanently to 8 data bits, 1 stop bit, no parity.
Baud Rates
Baud0 Baud1 Baud2
data format
8,N,1
1
0
0
2400
0
1
0
4800
1
1
0
9600
RTS/CTS handshake lines are not required. The required control is ^{0 0 1}
1
0
1
taken over by the integrated software protocol (see pages 10 and 11). ^{0 1 1}
1
1
1
19200
38400
57600
115200
0
0
0
230400
Application note
Note:
The pins BAUD 0 to 2, ADR 0 to 2, DPOM,
DPROT and TEST/SBUF have an internal
pullup, which is why only the LO level
(0=GND) is to be actively applied. These
pins must be left open for a hi level.
For RS232 operation (without
addressing) the pins ADR 0 to ADR 2
must be left open.
On pin 20 (SBUF) the display indicates
with a low level that data is ready to be
retrieved from the internal send buffer.
The line can be connected to an interrupt
input of the host system, for example.