MPC8543VTAQGA Freescale Semiconductor, MPC8543VTAQGA Datasheet - Page 71
MPC8543VTAQGA
Manufacturer Part Number
MPC8543VTAQGA
Description
Microprocessors - MPU PQ3 8543
Manufacturer
Freescale Semiconductor
Datasheet
1.MPC8548VTAUJD.pdf
(151 pages)
Specifications of MPC8543VTAQGA
Product Category
Microprocessors - MPU
Rohs
yes
Processor Series
PowerQUICC III
Data Bus Width
32 bit
Maximum Clock Frequency
1000 MHz
Maximum Operating Temperature
+ 105 C
Mounting Style
SMD/SMT
Package / Case
BGA
I/o Voltage
1.8 V, 2.5 V, 3.3 V
Minimum Operating Temperature
0 C
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to AC-coupling. Its value could be ranged from 140to 240 depending on the clock driver vendor’s
requirement. R2 is used together with the SerDes reference clock receiver’s 50- termination resistor to
attenuate the LVPECL output’s differential peak level such that it meets the SerDes reference clock’s
differential input amplitude requirement (between 200 and 800 mV differential peak). For example, if the
LVPECL output’s differential peak is 900 mV and the desired SerDes reference clock input amplitude is
selected as 600 mV, the attenuation factor is 0.67, which requires R2 = 25 Consult a clock driver chip
manufacturer to verify whether this connection scheme is compatible with a particular clock driver chip.
Figure 46
It assumes the DC levels of the clock driver are compatible with the SerDes reference clock input’s DC
requirement.
Freescale Semiconductor
LVPECL CLK Driver Chip
Clock Driver
Single-Ended CLK
Clock Driver
Clock Driver
Clock Driver
Figure 45. AC-Coupled Differential Connection with LVPECL Clock Driver (Reference Only)
Driver Chip
shows the SerDes reference clock connection reference circuits for a single-ended clock driver.
CLK_Out
CLK_Out
CLK_Out
CLK_Out
CLK_Out
MPC8548E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 9
Figure 46. Single-Ended Connection (Reference Only)
33
R1
R1
100 Differential PWB Trace
Total 50 Assume clock driver’s
output impedance is about 16
R2
R2
R2
R2
50
100 Differential PWB Trace
10 nF
10 nF
SD_REF_CLK
SD_REF_CLK
SD_REF_CLK
SD_REF_CLK
50
50
50
50
High-Speed Serial Interfaces (HSSI)
MPC8548E
SerDes Refer.
CLK Receiver
SerDes Refer.
CLK Receiver
MPC8548E
71
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