MC9S12P128 Datasheet, PDF (525/564 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

A.8 Electrical Specification for Voltage Regulator
Electrical Characteristics
Table A-24. IVREG Characteristics
Num C
Characteristic
Symbol
1
P Input Voltages
V_VDDR,A
2
P
VDDA Low Voltage Interrupt Assert Level ⁽¹⁾
VDDA Low Voltage Interrupt Deassert Level
V_LVIA
V_LVID
3
P _{VDDX Low Voltage Reset Deassert} ^{(2) (3)}
V_LVRXD
4
T
API ACLK frequency
(APITR[5:0] = %000000)
f_ACLK
5
C
Trimmed API internal clock⁽⁴⁾ ∆f / f_nominal
df_ACLK
The first period after enabling the counter
6
D by APIFE might be reduced by API start up
t_sdel
delay
7
T Temperature Sensor Slope
dV_TS
Min
3.13
4.04
4.19
—
—
- 5%
Typical
—
4.23
4.38
—
10
—
Max
5.5
4.40
4.49
3.13
—
+ 5%
Unit
V
V
V
V
KHz
—
—
—
100
us
mV/
4.0
5.5
6.5
o_C
High Temperature Interrupt Assert
8
T
(CPMUHTTR=$88)⁽⁵⁾
High Temperature Interrupt Deassert
(CPMUHTTR=$88)
T_HTIA
T_HTID
125
105
o_C
1. Monitors VDDA, active only in Full Performance Mode. Indicates I/O & ADC performance degradation due to low supply
voltage.
2. Device functionality is guaranteed on power down to the LVR assert level
3. Monitors VDDX, active only in Full Performance Mode. MCU is monitored by the POR in RPM (see Figure A-4)
4. The API Trimming APITR[5:0] bits must be set so that f_ACLK=10KHz.
5. A hysteresis is guaranteed by design
NOTE
The LVR monitors the voltages V_DD, V_DDF and V_DDX. As soon as voltage
drops on these supplies which would prohibit the correct function of the
microcontroller, the LVR is triggering a reset.
A.9 Chip Power-up and Voltage Drops
LVI (low voltage interrupt), POR (power-on reset) and LVRs (low voltage reset) handle chip power-up or
drops of the supply voltage.
S12P-Family Reference Manual, Rev. 1.12
Freescale Semiconductor
525