Datasheet
ST72321Rx ST72321ARx ST72321Jx
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12.4 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 get the total device consump-
tion, the two current values must be added (except for HALT mode for which the clock is stopped).
12.4.1 CURRENT CONSUMPTION
Notes:
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 12.4.2) and the peripheral power
consumption (Section 12.4.3).
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 characterisation 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 12.4.2).
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
=4MHz, f
CPU
=2MHz
f
OSC
=8MHz, 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
=2MHz, f
CPU
=62.5kHz
f
OSC
=4MHz, f
CPU
=125kHz
f
OSC
=8MHz, f
CPU
=250kHz
f
OSC
=16MHz, f
CPU
=500kHz
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
=2MHz, f
CPU
=1MHz
f
OSC
=4MHz, f
CPU
=2MHz
f
OSC
=8MHz, 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
=2MHz, f
CPU
=62.5kHz
f
OSC
=4MHz, f
CPU
=125kHz
f
OSC
=8MHz, f
CPU
=250kHz
f
OSC
=16MHz, f
CPU
=500kHz
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.
guar-
anteed
μA