User manual

39 GR-LEON4-ITX Development Board

User Manual

Pin Name Comment

+VE +5V Inner Pin, 5V, typically TBD A

-VE GND Outer Pin Return

Table 4-26: J22 -POWER +5V DC power input connector

Pin Name Comment

1 V+ 3.3V

2 DGND Ground

3 TCK JTAG: TCK

4 TDO JTAG: TDO

5 TDI JTAG TDI

6 TMS JTAG: TMS

Table 4-27: J23 -ASIC-JTAG JTAG interface

Pin Name Comment

1 V+ 3.3V

2 DGND Ground

3 SCK SPI: Clock

4 SDO SPI: Data Out

5 SDI SPI: Data In

6 SS SPI: Slave Select

Table 4-28: J24 -PROM-PROG Config Prom SPI program interface

4.2 List of Oscillators, Switches and LED's

Name Function Description

X1 OSC_MAIN Oscillator for main ASIC clock, SMD type, 3.3V, 50MHz

X2 OSC_USER Alternative User oscillator for main ASIC clock, DIL8 socket, 3.3V

X3 OSC_PCI Oscillator for PCI interfaces, 3.3V, 33.3MHz

X4 OSC_USB Oscillator for USB interfaces, 3.3V, 19.2MHz

Y1 XTAL_RTC 32.768kHz crystal for I2C Real Time Clock

Table 4-29: List and definition of Oscillators