HAC-UM Series RF Module Manual SHENZHEN HAC TECHNOLOGY CO., LTD.
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HAC-UM standard transceivers offer transparent protocol to support various applications and
protocols of users. If the user needs to decrease his cost or ease the workload of terminal CPU,
we can add other specific functions based on the transparent protocol, such as addressing, data
acquisition, command interpretation, etc.
6.
Sleep function instruction:
Due to reducing more consumption, HAC-UM transceivers support Sleep function. In sleep
mode, the current consumption is less than 5
µ
A.
The default set of sleep function is usually closed to ensure the reliability of preventing
transceivers from getting in wrong sleep mode. The sleep function can be opened by HAC after
informed or by user via programming them software.
a. How to use the Sleep function:
The Pin8
‘
SLP
’
in JP1 is the signal of sleep control. In high power level, when the transceiver
stays in sleep mode, the conversion from idle mode to sleep will be finished in 1ms. The SLP
signal can convert transceiver from idle to sleep mode in 1ms after rising edge. If the Sleep
signal arrives when the transceiver is transmitting data, the module will enter sleep mode after
finishing transmission. From sleep mode to idle, it takes the transceiver 10ms after falling edge.
To disable the sleep function of HAC-UM, the SLP (SLEEP) pin should be definitely connected
with 0 or ground.
b. Attentions about use of sleep function:
When the sleep function enabled, any supply glitches, such as switch dithering, fire striking or
quick switching on and off, could cause the transceiver to be switched to the wrong sleep mode.
After switching on, users can avoid this error by making a compulsive restoration once after the
CPU delays 100ms. But such a condition occurs seldom.
c. Sleep Time Diagram:
