DS600-10 March ‘06

©2004 Reg. No. 227 4001, ENGLAND

Page 8

RF / IR Encoder / Decoder Chipset

RF Evaluation Boards,

RF600E

RF600D

SLEEP

Holding this pin high will causes the device to run normally. Holding this pin low will causes the device to

enter a sleep mode where the current drain will be 1µA (typically). Taking the pin high will cause the device

to run normally.

Grounding the learn/LED pin (10) will cause the device to wake from sleep and service either a learn or

erase request: on completion of the function the device will re-enter sleep mode.

Note that while in sleep mode the S0 – S4 and low battery outputs will held high.

Notes to obtain Minimal Current consumption

Sleep/run applications will require close attention to external circuitry in order to minimise the sleep current

and allow a typical circuit draw of 1µA at +5 volts (with/without optional external eeprom).

With reference to the application schematic, the following should be noted;

1. Fit an additional 2.2MΩ resistor from pin 10 to +5 volts.

2. Fit an additional 2.2MΩ resistor from pin 3 to +5 volts.

3. Connect controlling drive to pin 13: high for run and low for sleep.

4. The S0 – S4 and low battery outputs are not asserted during sleep and will have to be sampled by the

controlling micro controller during run mode.

5. The S0 – S4 and low battery LED’s are not required as part of the circuit and can be omitted of

required.

6. Incoming data mark selection on pin 7 MUST be by a resistor (typically 22K) to either +5 or ground and

NOT by a direct connection.

7. The RF/IR data input (pin 9) must be at a valid logic level at all times. In sleep mode, if this input is

allowed to float then significant device current may flow.