AM186ED-20KCSLASHW datasheet(50/88 Pages) AMD

50 / 88 page

Am186ED/EDLV Microcontrollers

PRELI M INARY

F T

CAPACITANCE

Note:

Capacitance limits are guaranteed by characterization.

POWER SUPPLY CURRENT

For the following typical system specification shown in

Figure 11, ICC has been measured at 4.0 mA per MHz

of system clock. For the following typical system

specification shown in Figure 12, ICC has been

measured at 5.9 mA per MHz of system clock. The

typical system is measured while the system is

executing code in a typical application with nominal

voltage and maximum case temperature. Actual power

supply current is dependent on system design and may

be greater or less than the typical ICC figure presented

here.

Typical current in Figure 11 is given by:

ICC = 4.0 mA ⋅ freq(MHz)

Typical current in Figure 12 is given by:

ICC = 5.9 mA ⋅ freq(MHz)

Please note that dynamic ICC measurements are de-

pendent upon chip activity, operating frequency, output

buffer logic, and capacitive/resistive loading of the out-

puts. For these ICC measurements, the devices were

set to the following modes:

n No DC loads on the output buffers

n Output capacitive load set to 35 pF

n AD bus set to data only

n PIOs are disabled

n Timer, serial port, refresh, and DMA are enabled

Table 10 shows the variables that are used to calculate

th e typical pow er cons u mption value for the

Am186EDLV microcontroller.

Table 10. Typical Power Consumption Calculation

for the Am186EDLV Microcontroller

Figure 11.

Typical Icc Versus Frequency for

Am186EDLV Microcontroller

Figure 12.

Typical Icc Versus Frequency for Am186ED Microcontroller

Preliminary

Symbol

Parameter Description

Test Conditions

Min

Max

Unit

CIN

Input Capacitance

@ 1 MHz

CIO

Output or I/O Capacitance

@ 1 MHz

MHz

⋅ I

⋅ Volts / 1000 = P

Typical Power

in Watts

MHz

Typical ICC

Volts

4.0

3.6

0.288

4.0

3.6

0.360

Clock Frequency (MHz)

ICC (mA)

25 MHz

20 MHz

100

120

140

Clock Frequency (MHz)

ICC (mA)

33 MHz

20 MHz

40 MHz

120

160

200

240

280

25 MHz

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