General
5.2.2 LVD and POR operating requirements
Table 2. VDD supply LVD and POR operating requirements
Symbol Description
Min.
Typ.
Max.
Unit
Notes
VPOR
Falling VDD POR detect voltage
0.8
1.1
1.5
V
VLVDH
Falling low-voltage detect threshold — high
range (LVDV=01)
2.48
2.56
2.64
V
Low-voltage warning thresholds — high range
• Level 1 falling (LVWV=00)
1
VLVW1H
VLVW2H
VLVW3H
VLVW4H
2.62
2.72
2.82
2.92
2.70
2.80
2.90
3.00
2.78
2.88
2.98
3.08
V
V
V
V
• Level 2 falling (LVWV=01)
• Level 3 falling (LVWV=10)
• Level 4 falling (LVWV=11)
VHYSH
Low-voltage inhibit reset/recover hysteresis —
high range
—
80
—
mV
V
VLVDL
Falling low-voltage detect threshold — low range
(LVDV=00)
1.54
1.60
1.66
Low-voltage warning thresholds — low range
• Level 1 falling (LVWV=00)
1
VLVW1L
VLVW2L
VLVW3L
VLVW4L
1.74
1.84
1.94
2.04
1.80
1.90
2.00
2.10
1.86
1.96
2.06
2.16
V
V
V
V
• Level 2 falling (LVWV=01)
• Level 3 falling (LVWV=10)
• Level 4 falling (LVWV=11)
VHYSL
Low-voltage inhibit reset/recover hysteresis —
low range
—
60
—
mV
VBG
tLPO
Bandgap voltage reference
0.97
900
1.00
1.03
V
Internal low power oscillator period — factory
trimmed
1000
1100
μs
1. Rising thresholds are falling threshold + hysteresis voltage
Table 3. VBAT power operating requirements
Symbol Description
Min.
Typ.
Max.
Unit
Notes
VPOR_VBAT Falling VBAT supply POR detect voltage
0.8
1.1
1.5
V
K20 Sub-Family Data Sheet, Rev. 4 5/2012.
12
Freescale Semiconductor, Inc.
FREESCALE [ Freescale ]
