RF / IR Encoder / Decoder Chipset
RF Evaluation Boards,
RF600E
RF600D
Pin Descriptions
Pin
Number
Input /
Output?
Name
Description
1
2
Out
Out
Out
In
Data Output 3 (S2)
Data Output 4 (S3)
OP3
OP4
3
Low Battery, goes Low when Low Battery Valid
Positive supply voltage connection
Connect to GND
LB
4
Vcc
5
In
Vss
6
Out
Out
In / Out
In
Connects to EEPROM ‘CS’ pin
Connects to EEPROM ‘CLK’ pin. Also sets data mark.
Connects to EEPROM ‘Data’ pin
RF / IR Data input
ECS
7
ECLK
EDAT
IN
8
9
10
11
12
13
14
15
16
17
18
In
Learn / Erase Switch Input & Status LED Drive
Serial Data output
LRN
Out
In
SD1
Option Link Input for Momentary or Latched outputs
High = Run, Low = Sleep Mode
Positive supply voltage connection
No Connection
LKIN
SLEEP
Vcc
In
In
N/A
N/A
Out
Out
Unused
Unused
OP1
No Connection
Data Output 1 (S0)
Data Output 2 (S1)
OP2
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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