str912fa STMicroelectronics, str912fa Datasheet - Page 50

• Manufacturer Part Number: str912fa
• Description: Arm966e-s? 16/32-bit Flash Mcu With Ethernet, Usb, Can, Ac Motor Control, 4 Timers, Adc, Rtc, Dma
• Manufacturer: STMicroelectronics

Electrical characteristics
6.3
Table 9.
1. For V
2. Selection of V
3. For V
6.3.1
50/78
V
V
V
V
V
V
V
V
V
DD_LVD+
DD_LVD-
DD_BRN
DDQ_LVD+
DDQ_LVD-
DDQ_BRN
DDQ_LVD+
DDQ_LVD-
DDQ_BRN
condition is V
Symbol
DDQ
DDQ
(1.8V)
(1.8V)
LVD electrical characteristics
V
(1.8V)
LVD delay timing
Case 1: When V
by the VDD rising edge), a new ~10 ms delay starts before the release of RESET_OUTn. See
Figure 10.
Figure 10. LVD reset delay case 1
Case 2: When V
(introduced by the VDD rising edge), RESET_OUTn will be released immediately at the end of
the delay. No new delay is introduced in this case. See
V
V
RESET_OUTn (blue)
(3.0V)
(3.0V)
(3.3V)
(3.3V)
(3.0V) LVD threshold during V
(3.3V) LVD threshold during V
DDQ
I/O voltage operating at 2.7 - 3.3V.
I/O voltage operating at 3.0 - 3.6V.
DD
DDQ
LVD Electrical Characteristics
DDQ
DDQ
(green)
= 2.7 - 3.6V, V
(red)
=2.7V - 3.3V.
operation range is made using configuration software from ST, or IDE from 3rd parties. The default
LVD threshold during V
LVD threshold during V
V
LVD threshold during V
V
LVD threshold during V
V
DD
DDQ
DDQ
brown out warning threshold
brown out warning threshold
brown out warning threshold
DDQ
DDQ
V
DD_LVD+
Parameter
DD
reaches the V
reaches the V
= 1.65 - 2V, T
~10 ms delay
DD
DD
DDQ
DDQ
DDQ
DDQ
rise
fall
rise
fall
rise
fall
DDQ_LVD+
DDQ_LVD+
A
= -40 / 85 °C unless otherwise specified.
Conditions
threshold after the first ~10 ms delay (introduced
threshold before the first ~10 ms delay
Test
(1)(2)
(1)(2)
(1)(2)
(2)(3)
(2)(3)
(2)(3)
Figure 11.
1.43
1.33
2.32
2.23
2.61
2.52
Min
V
DDQ_LVD+
Value
1.50
1.40
1.65
2.45
2.35
2.65
2.75
2.65
2.95
Typ
~10 ms delay
Max
1.58
1.47
2.57
2.46
2.89
2.78
STR91xFA
Unit
V
V
V
V
V
V
V