Datasheet

DocID8349 Rev 7 131/170
ST7LITE20F2 ST7LITE25F2 ST7LITE29F2 Electrical characteristics
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13.5.1 Crystal and ceramic resonator oscillators
The ST7 internal clock can be supplied with eight different Crystal/Ceramic resonator
oscillators. All the information given in this paragraph are based on characterization results
with specified typical external components. In the application, the resonator and the load
capacitors have to be placed as close as possible to the oscillator pins in order to minimize
output distortion and start-up stabilization time. Refer to the crystal/ceramic resonator
manufacturer for more details (frequency, package, accuracy...).
Table 69. Auto Wakeup from Halt Oscillator (AWU)
Symbol Parameter
(1)
1. Guaranteed by design.
Conditions Min Typ Max Unit
f
AWU
AWU Oscillator Frequency − 50 125 250 kHz
t
RCSRT
AWU Oscillator startup time −−−50 µs