Electrical characteristics
ST72321Bxxx-Auto
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 110.
Current consumption
Symbol
Parameter
Conditions
Flash devices
ROM devices
Unit
Typ
Max(1)
Typ
IDD
Supply current in Run
mode(2)
fOSC = 2 MHz, fCPU =1MHz
fOSC = 4 MHz, fCPU =2MHz
fOSC = 8 MHz, fCPU =4MHz
fOSC =16MHz, fCPU =8MHz
1.3
2.0
3.6
7.1
3.0
5.0
8.0
15.0
0.5
1.2
2.2
4.8
1.0
2.0
4.0
8.0
mA
Supply current in Slow
fOSC = 2 MHz, fCPU = 62.5 kHz
fOSC = 4 MHz, fCPU = 125 kHz
fOSC = 8 MHz, fCPU = 250 kHz
fOSC =16MHz, fCPU =500 kHz
600
700
800
1100
2700
3000
3600
4000
100
200
300
500
600
700
800
950
A
Supply current in Wait
fOSC = 2 MHz, fCPU =1MHz
fOSC = 4 MHz, fCPU =2MHz
fOSC = 8 MHz, fCPU =4MHz
fOSC =16MHz, fCPU =8MHz
0.8
1.2
2.0
3.5
3.0
4.0
5.0
7.0
0.5
0.8
1.5
3.0
1.0
1.3
2.2
4.0
mA
Supply current in Slow Wait
fOSC = 2 MHz, fCPU = 62.5 kHz
fOSC = 4 MHz, fCPU = 125 kHz
fOSC = 8 MHz, fCPU = 250 kHz
fOSC =16MHz, fCPU =500 kHz
580
650
770
1050
1200
1300
1800
2000
50
90
180
350
100
150
300
600
A
Supply current in Halt
mode(3)
-40°C < TA < +85°C
<1
10
<1
10
A
-40°C < TA < +125°C
5
50
<1
50
Supply current in Active Halt
mode(4)
fOSC =2MHz
fOSC =4MHz
fOSC =8MHz
fOSC =16MHz
415
430
460
550
525
550
600
700
15
30
60
120
25
50
100
200
A
1.
Data based on characterization results, tested in production at VDD max. and fCPU max.
2.
Measurements are done in the following conditions:
- Program executed from RAM, CPU running with RAM access
- All I/O pins in input mode with a static value at VDD or VSS (no load)
- All peripherals in reset state
- LVD disabled
- Clock input (OSC1) driven by external square wave
- In Slow and Slow Wait mode, fCPU is based on fOSC divided by 32
- To obtain the total current consumption of the device, add the clock source (
Section 19.4.2) and the peripheral power
3.
All I/O pins in push-pull 0 mode (when applicable) with a static value at VDD or VSS (no load), LVD disabled. Data based on
characterization results, tested in production at VDD max. and fCPU 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 VDD or VSS (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).