MCBSTM32EXL Keil, MCBSTM32EXL Datasheet - Page 54

• Manufacturer Part Number: MCBSTM32EXL
• Description: BOARD EVALUATION FOR STM32F103ZE
• Manufacturer: Keil

Specifications of MCBSTM32EXL

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Power control (PWR)
4.1.1
4.1.2
54/995
Independent A/D converter supply and reference voltage
To improve conversion accuracy, the ADC has an independent power supply which can be
separately filtered and shielded from noise on the PCB.
●
●
When available (according to package), V
On 100-pin and 144- pin packages
To ensure a better accuracy on low voltage inputs, the user can connect a separate external
reference voltage ADC input on V
2.4 V to V
On 64-pin packages
The V
voltage supply (V
Battery backup domain
To retain the content of the Backup registers and supply the RTC function when V
turned off, V
by another source.
The V
the RTC to operate even when the main digital supply (V
V
If no external battery is used in the application, it is recommended to connect V
externally to V
AN2586).
When the backup domain is supplied by V
following functions are available:
●
●
BAT
The ADC voltage supply input is available on a separate V
An isolated supply ground connection is provided on pin V
PC14 and PC15 can be used as either GPIO or LSE pins
PC13 can be used as GPIO, TAMPER pin, RTC Calibration Clock, RTC Alarm or
second output (refer to
supply is controlled by the Power Down Reset embedded in the Reset block.
REF+
BAT
Warning:
DDA
pin powers the RTC unit, the LSE oscillator and the PC13 to PC15 IOs, allowing
and V
BAT
.
DD
pin can be connected to an optional standby voltage supplied by a battery or
REF-
DDA
through a 100 nF external ceramic capacitor (for more details refer to
During
is detected, the power switch between V
connected to V
During the startup phase, if V
t
and V
through an internal diode connected between V
power switch (V
If the power supply/battery connected to the V
support this current injection, it is strongly recommended to
connect an external low-drop diode between this power
supply and the V
RSTTEMPO
) and ground (V
pins are not available, they are internally connected to the ADC
DD
t
RSTTEMPO
Section 5: Backup registers (BKP) on page
> V
Doc ID 13902 Rev 9
(Refer to the datasheet for the value of t
BAT
REF+
BAT
+ 0.6 V, a current may be injected into V
BAT
SSA
(temporization at V
BAT
.
and V
).
).
pin.
REF-
DD
REF-
(analog switch connected to V
must be tied to V
. The voltage on V
DD
is established in less than
DD
DD
) is turned off. The switch to the
startup) or after a PDR
BAT
SSA
DDA
SSA
and V
.
.
pin.
REF+
BAT
DD
66)
DD
can range from
pin cannot
RSTTEMPO
and the
DD
remains
), the
BAT
BAT
DD
RM0008
)
is