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ST72321xx-Auto Electrical characteristics
Doc ID 13829 Rev 1 191/243
19.4 Supply current characteristics
The following current consumption specified for the ST7 functional operating modes over
temperature range does not take into account the clock source current consumption. To
obtain the total device consumption, the two current values must be added (except for Halt
mode, for which the clock is stopped).
19.4.1 Current consumption
Table 111. Current consumption
Symbol Parameter Conditions
Flash
devices
ROM
devices
Unit
Typ Max
(1)
Typ Max
(1)
I
DD
Supply current in
Run mode
(2)
f
OSC
= 2MHz, f
CPU
=1MHz
f
OSC
= 4 MHz, f
CPU
=2MHz
f
OSC
= 8 MHz, f
CPU
=4MHz
f
OSC
=16MHz, f
CPU
=8MHz
1.3
2.0
3.6
7.1
3.0
5.0
8.0
15.0
1.3
2.0
3.6
7.1
2.0
3.0
5.0
10.0
mA
Supply current in
Slow mode
(2)
f
OSC
= 2 MHz, f
CPU
=62.5kHz
f
OSC
= 4 MHz, f
CPU
= 125 kHz
f
OSC
= 8 MHz, f
CPU
= 250 kHz
f
OSC
=16MHz, f
CPU
= 500 kHz
600
700
800
1100
2700
3000
3600
4000
600
700
800
1100
1800
2100
2400
3000
µA
Supply current in
Wait mode
(2)
f
OSC
= 2 MHz, f
CPU
=1MHz
f
OSC
= 4 MHz, f
CPU
=2MHz
f
OSC
= 8 MHz, f
CPU
=4MHz
f
OSC
=16MHz, f
CPU
=8MHz
1.0
1.5
2.5
4.5
3.0
4.0
5.0
7.0
1.0
1.5
2.5
4.5
1.3
2.0
3.3
6.0
mA
Supply current in
Slow Wait mode
(2)
f
OSC
= 2 MHz, f
CPU
=62.5kHz
f
OSC
= 4 MHz, f
CPU
= 125 kHz
f
OSC
= 8 MHz, f
CPU
= 250 kHz
f
OSC
=16MHz, f
CPU
= 500 kHz
580
650
770
1050
1200
1300
1800
2000
70
100
200
350
200
300
600
1200
µA
Supply current in
Halt mode
(3)
-40°C < T
A
< +85°C <1 10 <1 10
µA
-40°C <
T
A
< +125°C <1 50 <1 50
I
DD
Supply current in
Active Halt mode
(4)
f
OSC
=2MHz
f
OSC
=4MHz
f
OSC
=8MHz
f
OSC
=16MHz
80
160
325
650
No max.
guaran-
teed
80
160
325
650
No max.
guaran-
teed
µA
1. Data based on characterization results, tested in production at V
DD
max. and f
CPU
max.
2. Measurements are done in the following conditions:
- Program executed from RAM, CPU running with RAM access. The increase in consumption when executing from Flash is
50%.
- All I/O pins in input mode with a static value at V
DD
or V
SS
(no load)
- All peripherals in reset state.
- LVD disabled.
- Clock input (OSC1) driven by external square wave.
- In Slow and Slow Wait mode, f
CPU
is based on f
OSC
divided by 32.
- To obtain the total current consumption of the device, add the clock source (Section 19.4.2) and the peripheral power
consumption (Section 19.4.3).
3. All I/O pins in push-pull 0 mode (when applicable) with a static value at V
DD
or VSS (no load), LVD disabled. Data based on
characterization results, tested in production at V
DD
max. and f
CPU
max.
4. Data based on characterization results, not tested in production. All I/O pins in push-pull 0 mode (when applicable) with a
static value at V
DD
or V
SS
(no load); clock input (OSC1) driven by external square wave, LVD disabled. To obtain the total
current consumption of the device, add the clock source consumption (Section 19.4.2).
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