Usb 2.0; Usb Phy Type; Signal Description; Real-Time Clock (Rtc) - Enclustra Mercury SA1 SoC Module User Manual

Pin Signal Value
MODE[3-0] 1110
PHYAD[2-0] 011
Clk125_EN 0
LED_MODE 1
LED1/LED2 1
Table 26: Gigabit Ethernet PHY Configuration
For the Ethernet PHY configuration via the MDIO interface, the MDC clock frequency must not exceed 1
MHz.
2.20

USB 2.0

The Mercury SA1 SoC module has an on-board USB 2.0 PHY connected to the SoC device. The USB interface
can be configured for USB host, USB device and USB On-The-Go (host and device capable) operations.
2.20.1

USB PHY Type

Table 27 describes the equipped USB PHY device type on the Mercury SA1 SoC module.
PHY Type Manufacturer
USB3320C Microchip
Table 27: USB 2.0 PHY Type
2.20.2

Signal Description

The ULPI interface is connected to HPS pins for use with the integrated USB controller. The USB reset has a
pull-down resistor and needs to be driven high to release the PHY from reset.
A detailed list of the HPS connections is found in Section 2.9.7.
2.21

Real-Time Clock (RTC)

A real-time clock is connected to the I2C bus. The RTC features a battery-buffered 128 bytes user SRAM and
a temperature sensor. See Section 4 for details on the I2C bus on the Mercury SA1 SoC module.
VBAT pin of the RTC is connected to VCC_BAT on the module connector, and can be connected directly to
a 3 V battery. Please refer to the Enclustra Module Pin Connection Guidelines [10] for details.
Note that the frequency output mode of the RTC must be disabled when using I2C interrupt system. Other-
wise, I2C_INT# is periodically pulled down by the RTC. The disabling of this function can be done by setting
bits [3:0] of the RTC register 8 to logic low.
D-0000-402-002
Description
RGMII mode: advertise all capabilities (10/100/1000, half/full duplex) ex-
cept 1000Base-T half duplex.
MDIO address 3
125 MHz clock output disabled
Single LED mode
Active-low LEDs
Type
USB 2.0 PHY
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