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OE
2V5
2V5_SLP
EMII_MDC_SLP
EMII_MDIO_SLP
RTL8211E-VB
(RGMII PHY)
PHY_ADDR=0X01
RTL8211E-VB
(RGMII PHY)
RTL8211DN
(SGMII PHY)
F104S8A
(QSGMII PHY)
F104S8A
(QSGMII PHY)
PHY_ADDR-0X02
PHY_ADDR-0X03
PHY_ADDR-0X04-07
PHY_ADDR-0X08-08
T1040
74LVC1G66*2
Figure 2-9. Management Data Input/Output (MDIO) connection
2.9 I2C
The T1040 devices support up to four I2C buses in order to make the I2C resources
equally available to both local and remote systems. The T1040RDB board uses I2C1 port
to access onboard devices, such as SPD on the DDR3L DIMM, thermal sensor
(ADT7461), and core power regulator (IR36021) . The I2C2 bus uses multiplexers to
partition the I2C bus into several sub-buses, called channels. The two mini-PCIe slots use
channel 0-1, or I2C2_CH0-1, channel 2 is unused on the T1040RDB board. The PCIe
slot uses channel 3.
The figure below shows the I2C subsystem.
Chapter 2 Architecture
QorIQ T1040 Reference Design Board User Guide, Rev. 0, 06/2015
Freescale Semiconductor, Inc.
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Содержание QorIQ T1040
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