4.6.6. I
2
C
I
2
C supports communication between integrated circuits on a board. It is a simple
two-wire bus that consists of a serial data line (SDA) and a serial clock (SCL). The
MAX V and the Intel Stratix 10 devices use the I
2
C for reading and writing to the
various components on the board such as programmable clock generators, VID
regulators, ADC and temperature sensors.
You can use the Intel Stratix 10 or MAX V as the I
2
C host to access these devices,
change clock frequencies or get board status information such as voltage and
temeprature readings.
Figure 9.
I
2
C Block Diagram
MAX 10 Intel FPGA
Download Cable II (U23)
Intel Stratix 10
FPGA (U1)
USB_SCL/SDA
QSFP28 (U17)
QSFP_SCL/SDA
Level Shift
QSFP_3p3V_SCL/SDA
FMCA (J13)
FMCA_SCL/SDA
Level Shift
FMCA_3p3V_SCL/SDA
USB PHY
(U26)
FX2_SCL/SDA
LED Board
I2C_SCL/SDA
Si5341A Clock (U7)
ADDR = 74h
Si5338A Clock (U9)
ADDR = 71h
LTC2497 ADC (U32)
ADDR = 14h
MAX1619 Temperature
Sensor (U35)
ADDR = 4Ch
LTM2987 Power
Management (U31)
ADDR = 5Ch, 5Dh
LTM4677 Regulator
(U62)
ADDR = 4Fh
DIP Switch (SW8)
Level Shift
Level Shift
MAX V System
Controller (U11)
I2C_1.8V_SCL/SDA
LT Programming
Header (J23)
LT_SCL/SDA
GPIO_SD
A
SDM_SD
A
LT_IO_SCL/SD
A
LT_1.8V_SCL/SD
A
DNI
Table 21.
MAX V I
2
C Signals
Schematic Signal Name
MAX V Pin Number
I/O Standard
Description
I2C_1.8V_SCL
P13
1.8V
I
2
C serial clock from MAX V
I2C_1.8V_SDA
R14
1.8V
I
2
C serial data from MAX V
4. Board Components
UG-20046 | 2018.07.20
Intel
®
Stratix
®
10 GX FPGA Development Kit User Guide
44