Datasheet

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ST7LITE20F2 ST7LITE25F2 ST7LITE29F2 Electrical characteristics
169
13.3.3 Auxiliary voltage detector (AVD) thresholds
T
A
= -40 to 85°C, unless otherwise specified.
13.3.4 Internal RC oscillator and PLL
The ST7 internal clock can be supplied by an internal RC oscillator and PLL (selectable by
option byte).
The RC oscillator and PLL characteristics are temperature-dependent and are grouped in
four tables.
Table 62. AVD thresholds
Symbol Parameter Conditions Min Typ Max Unit
V
IT+
(AVD)
1=>0 AVDF flag toggle threshold
(V
DD
rise)
High Threshold
Med. Threshold
Low Threshold
4.40
(1)
3.90
(1)
3.20
(1)
1. Not tested in production.
4.70
4.10
3.40
5.00
4.30
3.60
V
V
IT-
(AVD)
0=>1 AVDF flag toggle threshold
(V
DD
fall)
High Threshold
Med. Threshold
Low Threshold
4.30
3.70
2.90
4.60
3.90
3.20
4.90
(1)
4.10
(1)
3.40
(1)
V
hys
AVD voltage threshold hysteresis V
IT+
(AVD)
-V
IT-
(AVD)
− 150 − mV
ΔV
IT-
Voltage drop between AVD flag
set and LVD reset activation
V
DD
fall − 0.45 − V
Table 63. Internal RC oscillator and PLL
Symbol Parameter Min Typ Max Unit
V
DD(RC)
Internal RC Oscillator operating voltage 2.4 − 5.5
VV
DD(x4PLL)
x4 PLL operating voltage 2.4 − 3.3
V
DD(x8PLL)
x8 PLL operating voltage 3.3 − 5.5
t
STARTUP
PLL Startup time − 60 −
PLL
input
clock
(f
PLL
)
cycles