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The 5P49V5907B520NDGI is a programmable clock generator that generates most of the clocks. Clock configurations are stored
in its one-time programmable (OTP) memory. The configuration in volatile memory can be changed through the I2C1_CH1
interface. The device is accessible at 0x6A I2C 7-bit address. The frequencies are generated from a 25 MHz crystal (603-25-261
from FOX Electronics). The following table summarizes the specifications of each clock.
Table 6. LS1028ARDB clocks
Part
identifier
Clock generator
Clock
Specifications
Destination
U9
IDT 5P49V5907B520NDGI VDD0: FPGA_CLK_25MHz
• Frequency: 25 MHz
• Output type:
LVCMOS
• Operating voltage:
3.3 V
CPLD
OUT3,5:
SD1_REF_CLK1_[P, N]
SD1_REF_CLK2_[P,N]
• Frequency: 100 MHz
• Output type: LP-
HCSL
• Operating voltage:
1.8 V
SerDes1
controller
OUT6, 7
:
PEXM2_1_REFCLK_[P,N]
PEXM2_2_REFCLK_[P,N]
• Frequency: 100 MHz
• Output type: LP-
HCSL
• Operating voltage:
1.8 V
M.2 connectors
1 and 2
OUT4:
DIFF_SYSCLK[P, N]
• Frequency: 100 MHz
• Output type: HCSL
• Operating voltage:
3.3 V
DIFF_SYSCLK
OUT2:
DP_REFCLK_[P, N]
• Frequency: 27 MHz
• Output type: LVDS
• Operating voltage:
3.3 V
Display Port
OUT1:
125M0_LVDS_REF_CLK_[P,N]
• Frequency: 125 MHz
• Output type: LVDS
• Operating voltage:
3.3 V
QSGMII PHY
Y2
125 MHz crystal oscillator
(KC5032A125.000C1GE00
)
EC1_125MHz_CLK
(EC1_RX_CLK)
• Frequency: 125 MHz
• Output type:
LVCMOS
• Operating voltage:
1.8 V
Ethernet
controller / IEEE
1588 port
Table continues on the next page...
LS1028ARDB Functional Description
QorIQ LS1028A Reference Design Board Reference Manual, Rev. b, 11/2018
22
COMPANY CONFIDENTIAL
NXP Semiconductors
Содержание QorIQ LS1028A
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