mcf51ac256 Freescale Semiconductor, Inc, mcf51ac256 Datasheet - Page 19

• Manufacturer Part Number: mcf51ac256
• Description: Mcf51ac256 Coldfire Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
1
2
3
4
5
6
7
8
Num C
24
Typical values are based on characterization data at 25°C unless otherwise stated.
Measured with V
Measured with V
Measured with V
Power supply must maintain regulation within operating V
maximum current conditions. If positive injection current (V
flow out of V
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).
All functional non-supply pins are internally clamped to V
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.
The RESET pin does not have a clamp diode to V
D
DC injection current
DC injection current (Total MCU limit, includes
sum of all stressed pins)
DD
and could result in external power supply going out of regulation. Ensure external V
In
In
In
= V
= V
= V
DD
SS
DD
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.1
.
.
or V
Parameter
5 6 7 8
Preliminary—Subject to Change Without Notice
Table 10. DC Characteristics (continued)
SS
.
(single pin limit)
V
V
V
V
IN
IN
IN
IN
DD
>V
>V
<V
<V
. Do not drive this pin above V
DD
DD
SS
SS
SS
DD
In
Symbol
> V
and V
range during instantaneous and operating
I
IC
DD
) is greater than I
DD
.
Min
0
0
0
0
Preliminary Electrical Characteristics
Typical
DD
DD
—
—
—
—
, the injection current may
.
1
Max
–0.2
25
–5
2
DD
load will
Unit
mA
mA
19