Power Supply; Figure 5. Settings For Two-Pin Jumpers - ST STR910-EVAL User Manual

Hardware layout and configuration
The following sections provide jumper settings for configuring your STR910-EVAL
evaluation board and peripherals, including:
●

Power supply

●
Clock source
●
Reset source
●
Ethernet
●
Audio features
●
Serial Flash
●
CAN
Two types of jumpers are used on the STR910-EVAL evaluation board:
●
3-pin jumpers with two possible positions, for which settings are presented in
schematics in the following sections
● 2-pin jumpers with two possible settings: Fitted– the circuit is closed, and Not fitted–
the circuit is open (see
Figure 5.
2.1 Power supply
STR910-EVAL evaluation board is designed to be powered by a 5V DC power supply. It is
possible to configure the evaluation board to use any of the following three sources for the
power supply:
●
5V DC power adapter connected to the power supply jack (CN2, or PSU for Power
Supply Unit on the silk screen).
●
5V DC power with 500mA limitation via the USB type-B connector (CN3, or USB on
the silk screen).
●
5V DC power from the daughter board extension connectors (CN5 and CN6, DTB
for Daughter Board on the silk-screen).
There is also a 3V button battery, which can be used as a backup power supply for both the
RTC and the internal RAM of the STR91xF microcontroller.
The power supply is configured by setting the related jumpers, JP2, JP3, JP4, JP6 and
JP15 as described in
10/46
Figure
Settings for two-pin jumpers
Not fitted
Table 1.
● RS232 and IrDA
●
Motor control
●
RTC and tamper
●
USB
●
Development and debugging tool support
●
Display and input devices
5)
UM0174
Fitted