EAEDIP320B-8LW Datasheet, PDF (5/25 Pages) List of Unclassifed Manufacturers – CONTROL UNIT 320x240 WITH INTELLIGENCE

Specifications may be changed without
prior notice. Printing error reserved
EA eDIP320-8
Page 5
RS-232 INTERFACE
Pinout eDIP320-8: RS-232/RS-422 mode
If the display is wired as shown below, the
Pin Symbol
1 GND
In/Out Function
- Ground Potential for logic (0V)
Pin Symbol Function
25 N.C. not connected
RS-232 interface is selected. The pin 2
3
assignment is specified in the table on the ⁴
VDD
VADJ
VOUT
- Power supply for logic (+5V)
In Operating voltage for LC driving (input)
Out Output voltage for LC driving
right.
5 RESET
6 BAUD0
- L: Reset
In Baud Rate 0
26 N.C. not connected
27 N.C. not connected
28 N.C. not connected
29 N.C. not connected
30 N.C. not connected
The RxD andTxD lines lead 5V (CMOS level) 7 BAUD1
8 BAUD2
to a microcontroller, for example, for direct ^{9 ADR0}
connection.
10 RxD
11 TxD
In Baud Rate 1
In Baud Rate 2
In Address 0 for RS-485
In Receive Data
Out Transmit Data
31 N.C. not connected
32 N.C. not connected
33 N.C. not connected
34 N.C. not connected
35 N.C. not connected
If “genuine” RS-232 levels are required (e.g. ^{12 EN485}
for connection to a PC), an external level 13 WUP
14 ADR1
converter (e.g. MAX232) is required.
15 ADR2
16 BUZZ
Out Transmit Enable for RS-485 driver
In
L: (Power-On) disable Power-On-Macro
L: Wakeup from Powerdownmode
In Address 1 for RS-485
In Address 2 for RS-485
Out Buzzer output
36 N.C. not connected
37 N.C. not connected
38 N.C. not connected
39 N.C. not connected
40 N.C. not connected
Note:
The pins BAUD 0 to 2, ADR 0 to 2, WUP, 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.
17 DPROT
18 DPWR
19 WP
20
TEST
SBUF
21 PDI
In
L: Disable Smallprotokoll
do not connect for normal operation
L: Normal Operation
Out _{H: Powerdownmode}
In L: Writeprotect for DataFlash
IN
Out
open-drain with internal pullup 20..50k
IN (Power-On) L: Testmode
OUT L: data in sendbuffer
internal use, do not connect
41 N.C. not connected
42 N.C. not connected
43 N.C. not connected
44 N.C. not connected
45 N.C. not connected
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
22 PDO
23 N.C.
24 N.C.
internal use, do not connect
do not connect, reserved
do not connect, reserved
46 N.C. not connected
47 N.C. not connected
48 N.C. not connected
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.
BAUD RATES
Baud Rates
The baud rate is set by means of pins 6, 7 and 8 (baud 0 to 2). The Baud0 Baud1 Baud2
data format
8,N,1
data format is set permanently to 8 data bits, 1 stop bit, no parity.
0
0
0
1200
RTS/CTS handshake lines are not required. The required control is ^{1 0 0}
2400
0
1
0
4800
taken over by the integrated software protocol (see pages 8 and 9).
1
1
0
9600
0
0
1
19200
1
0
1
38400
0
1
1
57600
RS-485 INTERFACE
1
1
1
115200
With an external converter (e.g. SN75176), the EA eDIP320 can be connected to a 2-wire RS-485
bus. Large distances of up to 1200 m can thus be implemented (remote display). Several EA eDIP320
displays can be operated on a single RS-485 bus by setting addresses.
We recommend the EA 9778-1RS485 board for development.
Addressing:
- Up to eight hardware addresses (0 to 7) can be set by means of pins ADR0 to ADR2.
- The eDIP with the address 7 is selected and ready to receive after power-on.
- The eDIPs with the addresses 0 to 6 are deselected after power-on.
- Up to 246 further software
addresses can be set by means
of the ‘#KA adr’ command in the
power-on macro (set the eDIP
externally to the address 0).
application example