MC9S12HZ256 Datasheet, PDF (639/692 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

A.4 Voltage Regulator
Appendix A Electrical Characteristics
A.4.1 Operating Conditions
Table A-13. Voltage Regulator - Operating Conditions
Conditions are shown in Table A-4 unless otherwise noted
Num C
Characteristic
Symbol
Min
Typical
Max
Unit
1
P Input Voltages
2
P Regulator Current
Shutdown Mode
V_VDDR,A
4.5
—
5.5
V
I_REG
—
12
40
µA
3
P Output Voltage Core
Full Performance Mode
Shutdown Mode
V_DD
2.35
2.5
2.75
V
—
—¹
—
V
4
P Output Voltage PLL
Full Performance Mode
Shutdown Mode
V_DDPLL
2.35
2.5
2.75
V
—
—²
—
V
7
P Low Voltage Interrupt³
Assert Level
Deassert Level
V_LVIA
V_LVID
4.0
4.37
4.66
V
4.15
4.52
4.77
V
8
P Low Voltage Reset⁴
Assert Level
V_LVRA
2.25
—
—
V
9
C Power-on Reset⁵
Assert Level
Deassert Level
V_PORA
0.97
—
—
V
V_PORD
—
—
2.05
V
1 _{High Impedance Output}
2 _{High Impedance Output}
3 _{Monitors VDDA, active only in Full Performance Mode. Indicates I/O & ADC performance degradation due to low}
supply voltage.
4 _{Monitors VDD, active only in Full Performance Mode. MCU is monitored by the POR in RPM (see Figure A-2)}
5 _{Monitors VDD. Active in all modes.}
A.4.2 Chip Power-up and Voltage Drops
The voltage regulator sub modules LVI (low voltage interrupt), POR (power-on reset) and LVR (low
voltage reset) handle chip power-up or drops of the supply voltage. Their function is described in
Figure A-2.
MC9S12HZ256 Data Sheet, Rev. 2.04
Freescale Semiconductor
639