UM0238 Datasheet, PDF (5/20 Pages) STMicroelectronics – STR91x demonstration software

STR91x demonstration software
Functional description
1.1
Power control
STR910-EVAL evaluation board is designed to be powered by a 5V DC power supply. You
can configure the evaluation board to use any of the following three power sources:
● 5V DC power adapter connected to the power supply jack (marked CN2, or PSU for
Power Supply Unit on the silk screen).
● 5V DC power with 500mA limitation via the USB type-B connector (marked CN3, or
USB on the silk screen).
● 5V DC power from the daughter board extension connectors (marked CN5 and
CN6, DTB for Daughter Board on the silk-screen).
For more details, please refer to the power supply section on the STR910-EVAL Evaluation
Board user manual.
1.2
Clocking
Four clock sources are available on STR910-EVAL evaluation board for the microcontroller,
USB, RTC and Ethernet PHY transceiver:
● X1- 25 MHz crystal for the STR91xF microcontroller
● X2- 32 kHz crystal for the embedded RTC
● X3- 25 MHz crystal for Ethernet PHY transceiver U15
● U12- 48 MHz oscillator for USB
1.3
Reset control
The reset signal of STR910-EVAL evaluation board is low active.
The reset sources include:
● Power On Reset from STM1001 (U7)
● Reset button (PB2)
● Debugging tools via the CN9 or CN7 connector
● Daughter board via the CN6 connector
1.4
Development and debugging
The STR910-EVAL evaluation board supports connection to both In-Circuit Emulators (ICE)
via a 20-pin standard JTAG interface (CN9) and Trace tools via a 38-pin Embedded Trace
Macrocell (ETM) interface (CN7).
1.5
1.5.1
Displays and input devices
LCD
32x122 graphic LCD display connected to GPIOs.
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