SI4X55-C Datasheet, PDF (8/39 Pages) Silicon Laboratories – Preamble sense mode

Si4x55-C
Table 5. Auxiliary Block Specifications¹
Parameter
Symbol
Test Condition
Min
Typ
XTAL Range²
XTAL_RANGE
25
—
30 MHz XTAL Start-Up
time
t_30M
Using XTAL and board layout in —
300
reference design. Start-up time
will vary with XTAL type and
board layout.
30 MHz XTAL Cap
Resolution
30M_RES
—
70
POR Reset Time
Microcontroller Clock
Output Frequency Range³
t_POR
—
—
Configurable to Fxtal or Fxtal _{32.768 k —}
divided by 2, 3, 7.5, 10, 15, or 30
where Fxtal is the reference
XTAL frequency. In addition,
32.768 kHz is also supported.
Max Unit
32 MHz
—
µs
—
fF
6
ms
Fxtal Hz
Notes:
1. All minimum and maximum values are guaranteed across the recommended operating conditions of supply voltage and
from –40 to +85 °C unless otherwise stated. All typical values apply at VDD = 3.3 V and 25 °C unless otherwise stated.
2. XTAL Range tested in production using an external clock source (similar to using a TCXO).
3. Microcontroller clock frequency tested in production at 1 MHz, 30 MHz, 32 MHz, and 32.768 kHz. Other frequencies
tested by bench characterization.
8
Rev 1.0