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Table 6. LS1046ARDB clocks (continued)
Clock generator
Clocks
Specifications
Destination
DDRCLK_18
• Frequency: 100 MHz
• Output type: LVCMOS
• Operating voltage: 1.8 V
LS1046A processor (DDR clock)
SD1_REFCLK1_[P, N]
• Frequency: 100 MHz
• Output type: LP-HCSL
• Operating voltage: 3.3 V
LS1046A processor (SerDes1 PLL 1
clock)
SD1_REFCLK2_100M_[P, N]
• Frequency: 100 MHz
• Output type: LP-HCSL
• Operating voltage: 3.3 V
U31 clock buffer
SD2_REFCLK1_[P, N]
• Frequency: 100 MHz
• Output type: LP-HCSL
• Operating voltage: 3.3 V
LS1046A processor (SerDes2 PLL 1
clock)
SD2_REFCLK2_[P, N]
• Frequency: 100 MHz
• Output type: LP-HCSL
• Operating voltage: 3.3 V
LS1046A processor (SerDes2 PLL 2
clock)
25MHZ_EC1_RGMII
• Frequency: 25 MHz
• Output type: LVCMOS
• Operating voltage: 3.3 V
RGMII PHY (U17) (reference clock)
25MHZ_EC2_RGMII
• Frequency: 25 MHz
• Output type: LVCMOS
• Operating voltage: 3.3 V
RGMII PHY (U18) (reference clock)
25MHZ_EC3_SGMII
• Frequency: 25 MHz
• Output type: LVCMOS
• Operating voltage: 3.3 V
SGMII PHY (U16) (reference clock)
25MHZ_EC4_SGMII
• Frequency: 25 MHz
• Output type: LVCMOS
• Operating voltage: 3.3 V
SGMII PHY (U14) (reference clock)
25MHZ_CPLD
• Frequency: 25 MHz
• Output type: LVCMOS
• Operating voltage: 3.3 V
CPLD (reference clock)
Table continues on the next page...
Clocks
QorIQ LS1046A Reference Design Board Reference Manual, Rev. 2, 30 May 2019
NXP Semiconductors
21