MC9S08QE32_09 Datasheet, PDF (14/46 Pages) Freescale Semiconductor, Inc – 8-Bit HCS08 Central Processor Unit (CPU)

Electrical Characteristics
Table 7. DC Characteristics (continued)
Num C
Characteristic
Symbol
Condition
Min
Typical¹ Max
Unit
16 D POR re-arm time
t_POR
10
—
—
μs
17
P
Low-voltage detection threshold —
high range
V_LVDH
V_DD falling
V_DD rising
2.11
2.16
2.16
2.21
2.22
2.27
V
18
P
Low-voltage detection threshold —
low range
V_LVDL
V_DD falling
V_DD rising
1.80
1.88
1.82
1.90
1.91
1.99
V
19
P
Low-voltage warning threshold —
high range
V_LVWH
V_DD falling
V_DD rising
2.36
2.36
2.46
2.46
2.56
2.56
V
20
P
Low-voltage warning threshold —
low range
V_LVWL
V_DD falling
V_DD rising
2.11
2.16
2.16
2.21
2.22
2.27
V
21
C
Low-voltage inhibit reset/recover
hysteresis
V_hys
—
80
—
mV
22 P Bandgap Voltage Reference⁷
V_BG
1.15
1.17
1.18
V
1 _{Typical values are measured at 25 °C. Characterized, not tested}
2 _{As the supply voltage rises, the LVD circuit will hold the MCU in reset until the supply has risen above VLVDL.}
3 _{All functional non-supply pins, except for PTA5 are internally clamped to VSS and VDD.}
4 _{Input must be current limited to the value specified. To determine the value of the required current-limiting resistor, calculate}
resistance values for positive and negative clamp voltages, then use the larger of the two values.
5 _{Power supply must maintain regulation within operating VDD range during instantaneous and operating maximum current}
conditions. If positive injection current (V_In > V_DD) is greater than I_DD, the injection current may flow out of V_DD and could result
in external power supply going out of regulation. Ensure external V_DD load will shunt current greater than maximum injection
current. This will be the greatest risk when the MCU is not consuming power. Examples are: if no system clock is present, or
if clock rate is very low (which would reduce overall power consumption).
6 _{Maximum is highest voltage that POR is guaranteed.}
7 _{Factory trimmed at VDD = 3.0 V, Temp = 25 °C}
40
PULLUP RESISTOR TYPICALS
85°C
25°C
–40°C
35
PULLDOWN RESISTOR TYPICALS
40
85°C
25°C
–40°C
35
30
30
25
25
20
1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6
V_DD (V)
20
1.8
2.3
2.8
V_DD (V)
3.3 3.6
Figure 6. Pullup and Pulldown Typical Resistor Values (V_DD = 3.0 V)
MC9S08QE32 Series MCU Data Sheet, Rev. 6
14
Freescale Semiconductor