EAEDIP128B-6LW Datasheet, PDF (7/29 Pages) List of Unclassifed Manufacturers – OPERATING UNIT 128x64 with touch panel

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EA eDIP128-6
Page 7
I²C-BUS INTERFACE
If the display is wired as shown
below, it can be operated directly
on an I²C bus.
8 different base addresses and 8
slave addresses can be selected
on the display.
Data transfer is possible at up to
100 kHz. However, if pauses of at
least 100 µs are maintained
between the individual bytes
during transfer, a byte can be
transferred at up to 400 kHz.
Pinout eDIP128-6: I2C 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 (+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 BA0 In Basic Address 0
22 VDD
Power supply (+3,3..5V)
7 BA1 In Basic Address 1
23 NC
do not connect
8 SA0 In Slave Address 0
24 NC
do not connect
9 SA1 In Slave Address 1
25 IN8/OUT1
10 SA2 In Slave Address 2
11 BA2 In Basic Address 2
12 I2CMOD In connect to GND for I²C interface
26 IN7/OUT2
27 IN6/OUT3
28 IN5/OUT4
8 digital inputs
(internal 20k..50k pullup)
13 WUP
14 SDA
15 SCL
In
L: (Power-On) disable Power-On-Macro
L: Wakeup from Powerdownmode
Bidir. Serial Data Line
In Serial Clock Line
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
Note:
The pins DORD, CPOL, CPHA, 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.
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..
DATATRANSFER I²C INTERFACE
I²C - Address
Pin 11,7,6 Base
I²C address
BA2 BA1 BA0 address
D7 D6 D5 D4 D3 D2 D1 D0
L L L $10
0 001
L L H $20
0 010
L H L $30
L H H $40
H L L $70
H L H $90
0 011
0
0
1
1
0
1
0
1
S
A
2
S
A
1
S
A
0
R
W
1 001
H H L $B0
1 011
H H H $D0
1 101
all pins open: Write $DE
Read $DF
principle I2C-bus transfer:
- I²C-Start
- Master-Transmit: EA eDIP-I²C-address (e.g. $DE), send smallprotocol package (data)
- I²C-Stop
- I²C-Start
- Master-Read: EA eDIP-I²C-Address (e.g. $DF), read ACK-byte and opt. smallprotocoll package (data)
- I²C-Stop
Read operation: for internal operation the EA
eDIP does need a short time before providing
the data; therefore a short pause of min. 6µs is
needed for each byte (no activity of SCL line).
Application note