RF / IR Encoder / Decoder Chipset

RF600E

RF Evaluation Boards,

RF600D

Pin Descriptions

Pin

Number

Name

Input /

Output?

Description

1

OP3

Out

Data Output 3 (S2)

2

OP4

Out

Data Output 4 (S3)

3

LB

Out

Low Battery, goes Low when Low Battery Valid

4

Vcc

In

Positive supply voltage connection

5

Vss

In

Connect to GND

6

ECS

Out

Connects to EEPROM ‘CS’ pin

7

ECLK

Out

Connects to EEPROM ‘CLK’ pin. Also sets data mark.

8

EDAT

In / Out

Connects to EEPROM ‘Data’ pin

9

IN

In

RF / IR Data input

10

LRN

In

Learn / Erase Switch Input & Status LED Drive

11

SD1

Out

Serial Data output

12

LKIN

In

Option Link Input for Momentary or Latched outputs

13

SLEEP

In

High = Run, Low = Sleep Mode

14

Vcc

In

Positive supply voltage connection

15

Unused

N/A

No Connection

16

Unused

N/A

No Connection

17

OP1

Out

Data Output 1 (S0)

18

OP2

Out

Data Output 2 (S1)

Vcc / Vss

The power supply needs to be a stable regulated voltage with <10mV ripple

OP1-4

Digital Data outputs 1-4. These outputs are asserted LOW when the relevant inputs (S0 – S3) on the

RF600E are asserted. (see latch/unlatch information under ‘LKIN’).

LB

The RF600E automatically measures the battery voltage each time it is operated (see RF600E data). This

information is transmitted to the RF600D and if a low battery condition exists then the low battery output is

taken low. This indication is latched until data from a decoder with a good battery is received at which time

the output indication is cleared. (output goes high).

ECS / ECLK / EDAT

These connections are for interface to the EEPROM, which is used to store the identity of the encoders

taught to the system.

ECLK AM / FM Selection

Note that the ECLK output to the EEPROM is also used for data mark selection. The data mark input sets

the input of the RF600D to be compatible with AM or FM radio modulation.

When the ECS control line is low (i.e. when the EEPROM is not selected) the ECLK line is made an input

and a check is made for the presence of a pull-down or pull-up resistor.

If the data mark selection is pull-down then the RF600D will be set to receive Sync Low AM data.

If the data mark selection is pull-up then the RF600D will be set to receive Sync High FM and IR data.

DS600-9 Sept ‘04

©2004 Reg. No. 227 4001, ENGLAND

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