Shenzhen KYL Communication Equipment Co., Ltd
Fax: +86-755-83408785 [email protected] www.rf-data.com
The Pin8 ‘SLP’ in JP1 is the signal of sleep control. At high power level,
transceiver stays in working mode. At low power level (<0.5V), transceiver stays
in sleep mode. The SLP signal can convert transceiver from working to sleep
mode in 1ms after falling edge. If the Sleep signal arrives when the transceiver is
transmitting data, the module will move to sleep mode after finishing
transmission. From sleep moves to working, it takes the transceiver 1ms after
rising edge.
To disable the opened sleep function of KYL-220, the SLP (SLEEP) pin should
be definitely connected with 0 or ground.
b. Attentions about using sleep function:
When the sleep function enabled, or any supply glitches, such as switch dithering,
fire striking or quick switching on and off, may cause the transceiver switch to
wrong sleep mode.
After switching on, users can avoid this error by making a compulsive
restoration once after the CPU delays 100ms.
Sleep Timing Diagram:
9. The attentions of data transmission
a. The delay time (tc) of conversion between transmitting and receiving is less
than 1ms.
Timing diagram:
