TMC428_06 Datasheet, PDF (50/58 Pages) List of Unclassifed Manufacturers – Intelligent Triple Stepper Motor Controller with Serial Peripheral Interfaces

TMC428 DATASHEET (v. 2.02 / April 26^th, 2006)
50
17 Power-On-Reset
The TMC428 is equipped with a static and dynamic reset with internal hysteresis (see Figure 17-1). So,
it performs an automatic reset during power-on. If the power supply voltage goes below a threshold, an
automatic power on reset is performed also. The power on reset time tRESPOR also depends on the
power up time of the on-chip voltage regulator (see Table 16-1 ).
Symbol
VDD
Temp
Vop
Voff
Von
tRESPOR
Parameter
Power supply range
Temperature
Reset on/off
Reset off
Reset on
Reset time of on-chip power-on-reset
Conditions
Table 17-1: Characteristics of the on-chip power-on-reset
Min
Typ
Max
Unit
3.0
3.3
3.6
V
-55
25
125
°C
0.80
V
1.58
2.13
2.85
V
1.49
1.98
2.70
V
2.14
3.31
5.52
µs
static
Voff
Von
Vop
0
dynamic
Voff
Von
Vop
0
tRESPOR
Figure 17-1: Operating principle of the power-on-reset
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