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Electrical characteristics
ST72344xx, ST72345xx
13.5
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 consumption, the two current values must be added (except for Halt mode
for which the clock is stopped).
Figure 89.
Typical IDD in Run vs. fCPU
1.
Graph displays data beyond the normal operating range of 3 V - 5.5 V.
Table 92.
Supply current
Symbol
Parameter
Conditions(1)
1.
TA = -40 to +85°C unless otherwise specified
Typ
Max
Unit
IDD
Supply current in Run mode
V
DD
=5
.5
V
fCPU = 8 MHz
(2)
2.
CPU running with memory access, all I/O pins in input mode with a static value at VDD or VSS (no load), all
peripherals in reset state; clock input (OSC1) driven by external square wave, LVD disabled.
8.5
13
mA
Supply current in Wait mode
fCPU = 8 MHz
(3)
3.
All I/O pins in input mode with a static value at VDD or VSS (no load), all peripherals in reset state; clock
input (OSC1) driven by external square wave, LVD disabled.
3.7
6
Supply current in Slow mode
fCPU = 250 kHz
(4)
4.
Slow mode selected with fCPU based on fOSC divided by 32. All I/O pins in input mode with a static value at
VDD or VSS (no load), all peripherals in reset state; clock input (OSC1) driven by external square wave,
LVD disabled.
4.1
7
Supply current in Slow-wait
mode
fCPU = 250 kHz
(5)
5.
Slow-wait mode selected with fCPU based on fOSC divided by 32. All I/O pins in input mode with a static
value at VDD or VSS (no load), all peripherals in reset state; clock input (OSC1) driven by external square
wave, LVD disabled.
2.2
3.5
Supply current in Halt mode(6)
6.
All I/O pins in output mode with a static value at VSS (no load), LVD disabled. Data based on
characterization results, tested in production at VDD max and fCPU max.
-40°C
≤TA ≤ +85 °C
1
10
A
Supply current in AWUFH
mode (7)(8)
7.
All I/O pins in input mode with a static value at VDD or VSS (no load). Data tested in production at VDD max.
and fCPU max.
8.
This consumption refers to the Halt period only and not the associated run period which is software
dependent.
TA= +25 °C
50
60
Supply current in Active-halt
TA= +25 °C
500
700
0
1
2
3
4
5
6
7
8
9
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
Vdd (V)
ID
D
ru
n
(m
A
)v
s
F
re
q
(M
H
z
)
.5
1
2
4
6
8