Datasheet

Appendix A Electrical Characteristics
MC9S08QG8 and MC9S08QG4 Data Sheet, Rev. 5
270 Freescale Semiconductor
Internal pulldown resistor (KBI) R
PD
17.5 52.5 kΩ
Output high voltage — low drive (PTxDSn = 0)
I
OH
= –2 mA (V
DD
≥ 1.8 V)
V
OH
V
DD
– 0.5
—
V
Output high voltage — high drive (PTxDSn = 1)
I
OH
= –10 mA (V
DD
≥ 2.7 V)
I
OH
= –6 mA (V
DD
≥ 2.3 V)
I
OH
= –3 mA (V
DD
≥ 1.8 V)
V
DD
– 0.5
—
—
—
Maximum total I
OH
for all port pins | I
OHT
|— 60mA
Output low voltage — low drive (PTxDSn = 0)
I
OL
= 2.0 mA (V
DD
≥ 1.8 V)
V
OL
—0.5
V
Output low voltage — high drive (PTxDSn = 1)
I
OL
= 10.0 mA (V
DD
≥ 2.7 V)
I
OL
= 6 mA (V
DD
≥ 2.3 V)
I
OL
= 3 mA (V
DD
≥ 1.8 V)
—
—
—
0.5
0.5
0.5
Maximum total I
OL
for all port pins I
OLT
—60mA
DC injection current
2, 5, 6, 7
V
IN
< V
SS
, V
IN
> V
DD
Single pin limit
Total MCU limit, includes sum of all stressed pins
I
IC
–0.2
–5
0.2
5
mA
mA
Input capacitance (all non-supply pins) C
In
—7pF
1
RAM will retain data down to POR voltage. RAM data not guaranteed to be valid following a POR.
2
This parameter is characterized and not tested on each device.
3
Measurement condition for pull resistors: V
In
= V
SS
for pullup and V
In
= V
DD
for pulldown.
4
PTA5/IRQ/TCLK/RESET pullup resistor may not pullup to the specified minimum V
IH
. However, all ports are functionally tested
to guarantee that a logic 1 will be read on any port input when the pullup is enabled and no DC load is present on the pin.
5
All functional non-supply pins are internally clamped to V
SS
and V
DD
.
6
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.
7
Power supply must maintain regulation within operating V
DD
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).
Table A-6. DC Characteristics (continued)
Parameter Symbol Min Typical Max Unit