DE5-Net User Manual
June 20, 2018
21
J17
PCIE_REFCLK_p
From Host LVDS
PIN_AK38
PCI Express
lists the programmable oscillator control pins, signal names, I/O standard and their
corresponding Stratix V GX device pin numbers.
Table 2-9
Programmable oscillator control pin, Signal Name, I/O standard, Pin Assignments
and Descriptions
Programmable
Oscillator
Schematic
Signal Name
I/O Standard
Stratix V GX Pin
Number
Description
Si570
(U49)
CLOCK_SCL
2.5-V
PIN_AE15
I2C bus, direct
connected with Si570
CLOCK_SDA
2.5-V
PIN_AE16
CDCM61001
(U53)
PLL_SCL
2.5-V
PIN_AF32
I2C bus, connected
with MAX II CPLD
PLL_SDA
2.5-V
PIN_AG32
CDCM61004
(U28)
PLL_SCL
2.5-V
PIN_AF32
I2C bus, connected
with MAX II CPLD
PLL_SDA
2.5-V
PIN_AG32
2
2
.
.
6
6
R
R
S
S
-
-
4
4
2
2
2
2
S
S
e
e
r
r
i
i
a
a
l
l
P
P
o
o
r
r
t
t
The RS-422 is designed to perform communication between boards, allowing a transmission speed
of up to 20 Mbps.
shows the RS-422 block diagram of the development board. The
full-duplex LTC2855 is used to translate the RS-422 signal, and the RJ45 is used as an external
connector for the RS-422 signal.