AM188ES-40KCW Datasheet, PDF (54/102 Pages) Advanced Micro Devices – High Performance, 80C186-/80C188-Compatible and 80L186-/80L188-Compatible, 16-Bit Embedded Microcontrollers

Capacitance
PRELIMINARY
Symbol
Parameter Description
C_IN Input Capacitance
C_IO Output or I/O Capacitance
Note:
Capacitance limits are guaranteed by characterization.
Test Conditions
@ 1 MHz
@ 1 MHz
Preliminary
Min
Max
Unit
10
pF
20
pF
Power Supply Current
For the following typical system specification shown in
Figure 11, I_CC has been measured at 4.0 mA per MHz
of system clock. For the following typical system
specification shown in Figure 12, I_CC 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 maximum
voltage and maximum case temperature. Actual power
supply current is dependent on system design and may
be greater or less than the typical I_CC figure presented
here.
Typical current in Figure 11 is given by:
I_CC = 4.0 mA ⋅ freq(MHz)
Typical current in Figure 12 is given by:
I_CC = 5.9 mA ⋅ freq(MHz)
Please note that dynamic I_CC measurements are de-
pendent upon chip activity, operating frequency, output
buffer logic, and capacitive/resistive loading of the out-
puts. For these I_CC 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 9 shows the variables that are used to calculate
the typical power consumption value for each version
of the Am186ESLV and Am188ESLV microcontrollers.
Table 9. Typical Power Consumption Calculation
for the Am186ESLV and Am188ESLV
MHz ⋅ I_CC ⋅ Volts / 1000 = P
MHz
Typical I_CC Volts
20
4.0
3.6
Typical Power
in Watts
0.288
25
4.0
3.6
0.360
140
120
100
80
60
I_CC (mA)
40
25 MHz
20 MHz
20
0
10
20
30
Clock Frequency (MHz)
Figure 11. Typical I_CC Versus Frequency for the
Am186ESLV and Am188ESLV
280
240
200
160
120
I_CC (mA)
80
25 MHz
20 MHz
40 MHz
33 MHz
40
0
10
20
30
40
50
Clock Frequency (MHz)
Figure 12. Typical I_cc Versus Frequency for Am186ES and Am188ES
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Am186/188ES and Am186/188ESLV Microcontrollers