Datasheet

DS9178 Rev 4 57/96
STM8L051F3 Electrical parameters
87
In the following table, data is based on characterization results, unless otherwise specified.
Table 21. Total current consumption and timing in Active-halt mode at V
DD
= 1.8 V to 3.6 V
Symbol Parameter
Conditions
(1)
Typ Max Unit
I
DD(AH)
Supply current in
Active-halt mode
LSI RC (at 38 kHz)
T
A
= -40 °C to 25 °C
0.9 2.1
μA
T
A
= 55 °C 1.2 3
T
A
= 85 °C 1.5 3.4
LSE external clock (32.768
kHz)
(2)
T
A
= -40 °C to 25 °C
0.5 1.2
T
A
= 55 °C 0.62 1.4
T
A
= 85 °C 0.88 2.1
I
DD(WUFAH)
Supply current during
wakeup time from
Active-halt mode
(using HSI)
--2.4-mA
t
WU_HSI(AH)
(3)(4)
Wakeup time from
Active-halt mode to
Run mode (using HSI)
--4.77μs
t
WU_LSI(AH)
(3)
(4)
Wakeup time from
Active-halt mode to
Run mode (using LSI)
- - 150 - μs
1. No floating I/O, unless otherwise specified.
2. Oscillator bypassed (LSEBYP = 1 in CLK_ECKCR). When configured for extenal crystal, the LSE consumption
(I
DD LSE
) must be added. Refer to Table 29.
3. Wakeup time until start of interrupt vector fetch.
The first word of interrupt routine is fetched 4 CPU cycles after t
WU
.
4. ULP=0 or ULP=1 and FWU=1 in the PWR_CSR2 register.
Table 22. Typical current consumption in Active-halt mode, RTC clocked by LSE
external crystal
Symbol Parameter Condition
(1)
Typ Unit
I
DD(AH)
(2)
Supply current in Active-halt
mode
V
DD
= 1.8 V
LSE 1.15
µA
LSE/32
(3)
1.05
V
DD
= 3 V
LSE 1.30
LSE/32
(3)
1.20
V
DD
= 3.6 V
LSE 1.45
LSE/32
(3)
1.35
1. No floating I/O, unless otherwise specified.
2. Based on measurements on bench with 32.768 kHz external crystal oscillator.
3. RTC clock is LSE divided by 32.
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