MPC8308-RDB Freescale Semiconductor, MPC8308-RDB Datasheet - Page 29

• Manufacturer Part Number: MPC8308-RDB
• Description: BOARD REF DESIGN MPC8308
• Manufacturer: Freescale Semiconductor
• Series: PowerQUICC II™ PROr
• Type: MPUr

Specifications of MPC8308-RDB

• Contents: Board, Cables, Documentation, Power Supply, Software
• Ethernet Connection Type: Serial to Ethernet
• Data Rate: 10 Mbps, 100 Mbps, 1000 Mbps
• Memory Type: DDR2, SDRAM
• Interface Type: HSSI
• Operating Voltage: 1.5 V
• Operating Current: 5 uA
• Maximum Power Dissipation: 1000 mW
• Operating Temperature Range: - 55 C to + 125 C
• Product: Modules
• For Use With/related Products: MPC8308
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10.2.3
With on-chip termination to XCOREVSS, the differential reference clocks inputs are high-speed current
steering logic (HCSL) compatible and DC coupled.
Many other low voltage differential type outputs like low-voltage differential signaling (LVDS) can be
used but may need to be AC-coupled due to the limited common mode input range allowed (100–400 mV)
for DC-coupled connection.
LVPECL outputs can produce signal with too large amplitude and may need to be DC-biased at clock
driver output first, then followed with series attenuation resistor to reduce the amplitude, in addition to
AC-coupling.
Freescale Semiconductor
SD_REF_CLK
SD_REF_CLK
SD_REF_CLK
SD_REF_CLK
Figure 17. Differential Reference Clock Input DC Requirements (External DC-Coupled)
Figure 18. Differential Reference Clock Input DC Requirements (External AC-Coupled)
Interfacing with Other Differential Signaling Levels
SD_REF_CLK
SD_REF_CLK
Figure 19. Single-Ended Reference Clock Input DC Requirements
MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 2
200mV < Input Amplitude or Differential Peak < 800mV
200 mV < Input Amplitude or Differential Peak < 800mV
400 mV < SD_REF_CLK Input Amplitude < 800 mV
High-Speed Serial Interfaces (HSSI)
100 mV < Vcm < 400 mV
Vmin > Vcm – 400 mV
Vmax < Vcm + 400 mV
0 V
Vmax < 80 0mV
Vmin > 0 V
Vcm
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