EPC120 EPC [Espros Photonics corp], EPC120 Datasheet - Page 15

• Manufacturer Part Number: EPC120
• Description: Fully integrated Light-Barrier Chips with 2-Wire Bus Interface
• Manufacturer: EPC [Espros Photonics corp]

© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
All other registers are factory set and must not be used or altered.
8. Sample Parameter Setting
If we are going to use a system with a maximum cable length of 3 meters, and the maximum speed on the 2-wire bus, it is recommended to
set the registers as follows:
Parameter
Name
FUSEBIT
n/a
C2X
CDET
TPER
ROM RAM
RAM
Register No.
10
12
13
14
15
11
0
1
2
3
4
5
6
7
8
9
3
3
3
3
3
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
ROM
19
19
19
19
17
15
1
0
0
0
14
1
1
0
0
11
0
0
1
9
0
1
0
0
1
1
15
0
Bit No.
Figure 13: Sample parameter setting for high speed operation
15..13
11..10
8..1
0
9
Values
Register 18 is not programmed
Register 18 is programmed
10
13
0
1
0
1
1
0
1
0
Values
14
16mA
1
8mA
Values
100mV
200mV
50mV
12
0
0
0
0
n/a
13
0
Function
This bit will automatically be set when register 18 is programmed.
no function, must be set to “0”
Current amplitude on the 2-wire bus
Detection level for the comparator on the 2-wire bus. The level represents the optimum sig -
nal amplitude on the bus.
must be set to “010”
Table 6: epc120 Registers 3 and 19
11
0
0
0
1
Address
Default Setting
Default Setting
10
1
0
0
0
X
X
9
1
0
1
0
15
don't use
don't use
don't use
8
0
0
0
0
Chip ID
Bit #
Recommended Setting
Recommended
7
0
0
1
0
Setting
X
6
0
0
0
0
X
5
0
0
0
0
4
1
0
1
0
don't use
3
0
0
0
0
2
0
0
1
0
Datasheet epc12x - V2.1
1
1
0
1
0
X
X
X
X
0
www.espros.ch
epc120