nitrous2000
Member
Hi folks,
I'm trying to set up an encoded signal from a transmitter using the above chip.
It doesn't have a TE line, it simply wakes up when there is an active data line.
On the sample circuit, they ground unused data pins, but on the switched pin, there is a 200k resister to ground, and a Vcc connection to a switch. If I want to permanently have D0 attached to Vcc, do I need the 200k resistor? Can I just ground the unused data pins and fix the active pin to Vcc directly?
Am I correct in thinking that if I simply power the circuit on/off, it will continuously transmit the D0 signal? Is this really bad from a design perspective ie should I switch the D0 line and leave the Vcc power to the chip allowing the circuit to sleep/wake according to the D0 state?
Thanks
Doug
I'm trying to set up an encoded signal from a transmitter using the above chip.
It doesn't have a TE line, it simply wakes up when there is an active data line.
On the sample circuit, they ground unused data pins, but on the switched pin, there is a 200k resister to ground, and a Vcc connection to a switch. If I want to permanently have D0 attached to Vcc, do I need the 200k resistor? Can I just ground the unused data pins and fix the active pin to Vcc directly?
Am I correct in thinking that if I simply power the circuit on/off, it will continuously transmit the D0 signal? Is this really bad from a design perspective ie should I switch the D0 line and leave the Vcc power to the chip allowing the circuit to sleep/wake according to the D0 state?
Thanks
Doug