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LQFP176 Datasheet(PDF) 93 Page - STMicroelectronics

Part # LQFP176
Description  Variable length encoding
PDF  133 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LQFP176 Datasheet(HTML) 93 Page - STMicroelectronics

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DocID15131 Rev 9
93/133
SPC560B54x/6x
Electrical characteristics
132
Figure 15. Slow external crystal oscillator (32 kHz) timing diagram
4.14
FMPLL electrical characteristics
The device provides a frequency modulated phase locked loop (FMPLL) module to
generate a fast system clock from the main oscillator driver.
OSCON bit (OSC_CTL register)
TLPXOSC32KSU
1
VOSC32K_XTAL
VLPXOSC32K
valid internal clock
90%
10%
1/fLPXOSC32K
0
Table 40. Slow external crystal oscillator (32 kHz) electrical characteristics
Symbol
C
Parameter
Conditions(1)
Value
Unit
Min
Typ
Max
fSXOSC
S
R
—
Slow external crystal oscillator
frequency
—32
32.76
8
40
kHz
VSXOSC
C
C
T Oscillation amplitude
—
—
2.1
—
V
ISXOSCBIAS
C
C
T Oscillation bias current
—
2.5
µA
ISXOSC
C
C
T
Slow external crystal oscillator
consumption
——
—
8
µA
tSXOSCSU
C
C
T
Slow external crystal oscillator
start-up time
——
—
2(2)
s
1.
VDD = 3.3 V ± 10% / 5.0 V ± 10%, TA = 40 to 125 °C, unless otherwise specified. Values are specified for no neighbor
GPIO pin activity. If oscillator is enabled (OSC32K_XTAL and OSC32K_EXTAL pins), neighboring pins should not toggle.
2.
Start-up time has been measured with EPSON TOYOCOM MC306 crystal. Variation may be seen with other crystal.



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