Shiratech Solutions Spark-100, Integration Manual, Page: 13 / 41

13 | Spark-100 HW user manual v1.3
The default configuration of the USB switch enables the USB HUB interface.
Each of the USB interfaces provides control signals (Power_EN, Over_Current) for controlling an external
USB power distributer located on the carrier board.
2.3.2 Ethernet port
The SPARK-100 supports a single 10/100/1000 Ethernet interface from the HPS (RGMII 1). The Ethernet
Phy in connected via an RGMII interface to the HPS. The following figure describes the Giga Ethernet
interface.
Figure 8 - Giga Ethernet & Fast Ethernet Interfaces
The Ethernet PHY is KSZ9031 by Micrel. It uses an RGMII interface running at 125MHz. The 125 MHz
clock is generated by the Ethernet PHY.
The Ethernet PHY analog signals (TX+/-, RX+/-) are connected the SMARC edge connector. Two LED
signals from the GE PHY are also connected to the SMARC edge connector. MDC/MDIO - The Ethernet
MDC/MDIO signals are connected to the internal phy and are not available on the SMARC connector.
2.3.3 UART
The SOM offer one or two UARTs. Each UART includes Rx, Tx , CTS and RTS. The HPS supports up to two
UART interfaces. UART 0 is usually used for Linux CLI interface. Some of the UART signals share the same
pins as the SPI interfaces which available on the SMARC connector.

Programmable character properties, such as number of data bits per character, optional parity
bits, and number of stop bits.

Programmable baud rate.

Automatic flow control mode per 16750 standard.

The maximum UART baud rate is 6.25 mega symbols per second.
2.3.4 CAN
The HPS offers up to two CAN controllers
based
on the Bosch® D_CAN controller and offer the following
features:
HPS
Micrel
ksz9031
RGMII
4 x TX
4 x RX
Controls
125 Mhz
25M
Int.
NReset
LEDS
LEDS
GE Analog
Carrier Module