ST72681 STMicroelectronics, ST72681 Datasheet - Page 27

• Manufacturer Part Number: ST72681
• Description: USB 2.0 HIGH-SPEED 8-BIT MCU FLASH DRIVE CONTROLLER
• Manufacturer: STMicroelectronics

ST72681
7.8
7.8.1
Figure 16. Typical V
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
A
t
t
Symbol
t
t
ew(RSTL)
eh(RSTL)
iw(RSTL)
g(RSTL)
= 0 to +55 °C unless otherwise specified.
Asynchronous RESET
pulses applied on RESET pin with a duration below t
guaranteed by design.
at power-up. Not tested in production, guaranteed by design.
V
R
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
RESET pin characteristics
pin. Otherwise the reset will not be taken into account internally.
Parameter
DD33
-V
180
160
140
120
100
OH
80
60
40
20
0
0
(1)
(3)
vs. V
Vdd-Voh I/Os D8 at Vdd=3.3V
2
DD33
(4)
(2)
4
(I/O D8)
Ioh (mA)
V
V
eh(RSTL)
Conditions
DD33
DD33
6
= 3.3 V
= 2 V
IL
can be ignored. Not tested in production,
max. level specified in
8
10
0.85 x
V
Min.
500
DD33
2.5
20
Electrical characteristics
Typ.
450
100
200
40
Section 7.8.1:
2
0.16 x
V
Max.
DD33
80
Unit
t
27/34
mV
CPU
kΩ
µs
ns
µs
V