EPC110 EPC [Espros Photonics corp], EPC110 Datasheet - Page 12

• Manufacturer Part Number: EPC110
• Description: Fully integrated configurable light barrier driver & receiver
• Manufacturer: EPC [Espros Photonics corp]

Parameter settings can be done by writing complete 16 bit registers only.
Bits marked up in white fields shall be modified or programmed only. Gray marked bits with a given value in the memory map above must be
set to this. Never change the memory content of gray marked cells without numeric indication. Writing to this cells is not allowed.
The RAM can be written only, if the corresponding ROM memory hasn’t been written before (FUSEBIT = 0) or if the volatile mode is active
(VMODE = 0). The first bit of each 16-bit ROM register serves as write inhibit bit (FUSEBIT). To write to the ROM, the micro-controller has to
write the data to the RAM first (with FUSEBIT = 0). From there, the micro-controller can first double check the data integrity. When a memory
section is verified, the content can be transferred from the RAM memory to the ROM using the command PROG (refer to chapter Command
PROG). While processing this instruction the FUSEBIT will be set to “1” by epc110.
The device is fully operational as well without programming the ROM, but data will be lost at power down. Operating the chip in this mode is
helpful during the development of the product or if your application needs an adaptive mode. However, in the final application for a standalone
or self-reboot operation, the parameters must be stored into the ROM memory.
Parameter Description (epc110)
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
Parameter
Name
FUSEBIT
POL
TPULSE
n/a
MODE
ROM
Register No.
0
0
0
2
0
RAM
16
16
16
18
16
14 13
11
14...12
Bit No.
1
0
x
1
0
0
1
1 Values
0 active low
1 active high
4
0
0
0
0
1
1
1
1
11...5
4...2
1
0
Values
The corresponding ROM register is not programmed
The corresponding ROM register is programmed
10
0
1
x
0
3
0
0
1
1
0
0
1
1
12 Value
1
1
9
0
x
Polarity of the LED pulse. Setting is depending on the LED driver circuitry.
Pulse length t
Definition of operation mode.
2
0
1
0
1
0
1
0
1
no function, must be set as listed below
Function
During write operation to this RAM register, put this bit = 0.
This bit will be set automatically, when corresponding ROM register is prog rammed.
Fork light barrier, standalone mode:
LED pulse and light detection reading generated internally.
Fork light barrier, controlled mode:
Externally stimulated LED pulse by positive edge of signal on pin EN.
Externally controlled light detection by signal on pin EN=1.
All other settings forbidden. Function of the device not defined and guaranteed.
8
0
Values
1μs
2μs
3μs
4μs
5μs
6μs
7μs
8μs
7
0
6
0
Pulse
Default
5
0
of the light pulse
X
Default
X
Recommended Setting
12
X (typical setting)
Recommended Setting
X
Datasheet epc110 - V2.1
www.espros.ch
epc110