EAEDIP320B-8LW Datasheet, PDF (7/25 Pages) List of Unclassifed Manufacturers – CONTROL UNIT 320x240 WITH INTELLIGENCE

Specifications may be changed without
prior notice. Printing error reserved
EA eDIP320-8
Page 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.
Note:
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.
Pinout eDIP320-8: I2C mode
Pin Symbol In/Out Function
Pin Symbol Function
1 GND
- Ground Potential for logic (0V)
25 N.C. not connected
2 VDD
- Power supply for logic (+5V)
26 N.C. not connected
3 VADJ
In Operating voltage for LC driving (input)
27 N.C. not connected
4 VOUT Out Output voltage for LC driving
28 N.C. not connected
5 RESET
- L: Reset
29 N.C. not connected
6 BA0
In Basic Address 0
30 N.C. not connected
7 BA1
In Basic Address 1
31 N.C. not connected
8 SA0
In Slave Address 0
32 N.C. not connected
9 SA1
In Slave Address 1
33 N.C. not connected
10 SA2
In Slave Address 2
34 N.C. not connected
11 BA2
In Basic Address 2
35 N.C. not connected
12 I2CMODE In connect to GND for I²C interface
36 N.C. not connected
13 WUP
In
L: (Power-On) disable Power-On-Macro
L: Wakeup from Powerdownmode
37 N.C. not connected
14 SDA Bidir. Serial Data Line
38 N.C. not connected
15 SCL
In Serial Clock Line
39 N.C. not connected
16 BUZZ Out Buzzer output
40 N.C. not connected
17 DPROT
In
L: Disable Smallprotokoll
do not connect for normal operation
41 N.C. not connected
18 DPWR
L: Normal Operation
Out _{H: Powerdownmode}
42 N.C. not connected
19 WP
In L: Writeprotect for DataFlash
43 N.C. not connected
20
TEST
SBUF
IN
Out
open-drain with internal pullup 20..50k
IN (Power-On) L: Testmode
OUT L: data in sendbuffer
44 N.C. not connected
21 PDI
internal use, do not connect
45 N.C. not connected
22 PDO
internal use, do not connect
46 N.C. not connected
23 N.C.
do not connect, reserved
47 N.C. not connected
24 N.C.
do not connect, reserved
48 N.C. not connected
Note:
The pins BA0 to 2, SA0 to 2, DPOM, DPROT and TEST/SBUF have an internal pullup, which is why only the LO level (L=0=GND) is to be
actively applied. These pins must be left open for a Hi level (H=1).
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.
I²C - Address
Pin 11,7,6 Base
BA2 BA1 BA0 ^address
I²C address
D7 D6 D5 D4 D3 D2 D1 D0
L L L $10
00 01
L L H $20
00 10
L H L $30
L H H $40
H L L $70
H L H $90
00 11
0
0
1
1
0
1
0
1
S
A
2
S
A
1
S
A
0
R
W
10 01
H H L $B0
10 11
H H H $D0
11 01
DATA TRANSFER I²C-BUS
principle I2C-bus transfer:
all pins open: Write $DE
Read $DF
- 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 example