ST72682 STMicroelectronics, ST72682 Datasheet - Page 29

• Manufacturer Part Number: ST72682
• Description: USB 2.0 high-speed Flash drive controller
• Manufacturer: STMicroelectronics

ST72682
7.8
7.8.1
Control pin characteristics
Asynchronous RESET pin
T
Table 22.
1. The level on the RESET pin must be free to go below the V
2. To guarantee the reset of the Device, a minimum pulse has to be applied to the RESET pin. All short
3. The reset network protects the device against parasitic resets.
4. The external reset duration must respect this timing to guarantee a correct start-up of the internal regulator
Figure 17. Typical R
t
A
t
.
Symbol
t
t
ew(RSTL)
eh(RSTL)
iw(RSTL)
g(RSTL)
R
ranges between 0 and +55 °C unless otherwise specified.
V
Otherwise the reset will not be taken into account internally.
pulses applied on RESET pin with a duration below t
guaranteed by design.
at power-up. Not tested in production, guaranteed by design.
V
V
hys
ON
IH
IL
Input low level voltage
Input high level voltage
Schmitt trigger voltage
hysteresis
Pull-up equivalent resistor
External reset pulse hold time
Filtered glitch duration
External reset pulse duration
Internal reset pulse duration
Asynchronous RESET pin characteristics
(1)
Parameter
ON
on RESET pin
(1)
(3)
100
NRESET pull-up (kOhms)
80
60
40
2
(4)
(2)
V
V
Conditions
DD33
DD33
VDD (V)
eh(RSTL)
= 3.3 V
= 2 V
3
IL
can be ignored. Not tested in production,
max. level specified in
0.85V
Min
500
2.5
20
DD33
Electrical characteristics
Typ
450
100
200
40
2
Section
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0.16V
7.8.1.
Max
80
DD33
Tcpu
Unit
29/36
mV
kΩ
µs
ns
µs
V