Proprietary and Confidential Information of YAMAR Electronics Ltd.

© 2007 Yamar Electronics Ltd.

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DS-ISL40 R1.6

4.3.2

InterfHop

When high, a detection of interference, switches the operating frequency. If at the new frequency, no

reception occurred for 2 sec, the operating frequency is switched back.

For designs with a single channel this pin should be tied to ground.

4.3.3

Interfer

Output signal is raised while interference is detected on the DC-BUS.

4.3.4

MF0nF1

Indicates the operating frequency, this is the configured frequency unless automatic frequency change

has been enabled and caused.

4.4

Line Interface

4.4.1

DTxO

Modulated transmit signal output.

4.4.2

TxOn

High when the device is transmitting a message.

4.4.3

RxP

Input to the internal comparator positive pin. It swings around RxN.

4.4.4

RxN

Input to the internal comparator negative pin. Its value should be about Vcc/2.

4.4.5

RxOn

High when the device is in receive mode.

4.4.6

Power Signals

There are three sets of power signals, (Vcc, Gnd)*2 and VccPLL, GndPLL. See 4.7 for details.

VCC

VccPLL

VCC

VCC

VCC

VCC

VCC

VCC

VCC

Analog Interface

Protection Network

Vcc = 3.3V

I/O lines

Configuration lines (connect to Gnd or Vcc)

DC-Powerline

TxOn

RxOn

R23

3.3K

R11

1M

R8

1M

R10

6.8

R4

2.2

D1 BAS31

C4

0.1u

C5

2.2nF/200V

R1

10M

R24

39K

X1

32.768KHz

R3

22 /0.25W

C1

12p

C6

47p

C3

0.1

R9

6.8

C7

1n

C10

1n

R13

2.2

C12

1n

R19

470

C2

12p

Q2

Q1

PZT2222

R15

4.3K

R12

1K

R18

18

C9

1n

R17

3.9K

R34

330

R2

330K

C101

0.1u

R7

1M

R8

1M

FSA3157

4

1

3

6

R101

100K

R7

2K

R5

100

C57

1u

C8

0.1u

C150

>47uF

ISL40

DRxN

5

Vcc

3

Mode3

4

F0F1-2

34

Id0

30

SigO1

9

SigO2

10

Mode4

7

Wake

33

F0F1-3

35

AutoFreqChange

26

nSleep

28

SigIn3

29

nReset

32

DRxP

6

Interf Hop

36

OscOut

1

Id1

31

SigO3

11

OscIn

2

SigO0

8

AutoSleep

27

Gnd

12

SigIn2

25

R14

1K

Ceramic Filter

Figure 4.2 – Typical single channel line interface circuit

Note: The FSA3157 can be replaced with an analog switch.