AN2536 Freescale Semiconductor / Motorola, AN2536 Datasheet - Page 18

• Manufacturer Part Number: AN2536
• Description: MC9328MX1 and MC9328MXL High Speed Layout Design Guidelines
• Manufacturer: Freescale Semiconductor / Motorola

MC9328MX1/MXL Case Study
Comparing the trace length and setup time, the connection between the memory and the MC9328MX1/
MXL should not be longer than 4cm (<65 ohm) and it is recommended the total metal delay should be
smaller than 800ps, trace inductance should be smaller than 28 nH and trace capacitance should under
15 pF.
18
Figure 28. MC9328MX1 Demo v0.1 Simulation Data and Characteristics of the Worst Case Signals
NET = SDCLK
NET = A9
NET = D13
NET = ~SDWE
INTERCONNECT STATISTICS -------------------------------------------
INTERCONNECT STATISTICS -------------------------------------------
INTERCONNECT STATISTICS -------------------------------------------
INTERCONNECT STATISTICS -------------------------------------------
total metal delay............ 290.740 ps
minimum metal Z0 ............. 52.5 ohms
maximum metal Z0 ............. 62.5 ohms
total metal capacitance ...... 4.7 pF
total metal inductance ....... 18.1 nH
total metal resistance ....... 93.1 milliohms
total metal length ........... 001.740 in
average metal Z0 ............. 62.1 ohms
total metal delay ............ 579.344 ps
minimum metal Z0 ............. 40.8 ohms
maximum metal Z0 ............. 55.4 ohms
total metal capacitance ...... 13.0 pF
total metal inductance ....... 26.3 nH
total metal resistance ....... 354.5 milliohms
total metal length ........... 003.319 in (001.823 in for the SDRAM segment)
average metal Z0 ............. 45.0 ohms
total metal delay ............ 343.398 ps
minimum metal Z0 ............. 40.8 ohms
maximum metal Z0 ............. 55.4 ohms
total metal capacitance ...... 6.9 pF
total metal inductance ....... 17.5 nH
total metal resistance ....... 209.4 milliohms
total metal length ........... 001.966 in
average metal Z0 ............. 50.5 ohms
total metal delay ............ 301.177 ps
minimum metal Z0 ............. 52.5 ohms
maximum metal Z0 ............. 55.4 ohms
total metal capacitance ...... 5.5 pF
total metal inductance ....... 16.5 nH
total metal resistance ....... 171.0 milliohms
total metal length ........... 001.703 in
average metal Z0 ............. 54.8 ohms
(SDCLK .................................... 4.7 pF)
(SDCLK .................................... 18.1 nH)
(SDCLK .................................... 93.1 milliohms)
(A9 ....................................... 13.0 pF)
(A9 ....................................... 26.3 nH)
(A9 ....................................... 354.5 milliohms)
(D13 ...................................... 6.9 pF)
(D13 ...................................... 17.5 nH)
(D13 ...................................... 209.4 milliohms)
(~SDWE .................................... 5.5 pF)
(~SDWE .................................... 16.5 nH)
(~SDWE .................................... 171.0 milliohms)
From the Clock, Address, Data and Control Traces
Freescale Semiconductor, Inc.
For More Information On This Product,
MC9328MX1/MXL Application Note
Go to: www.freescale.com
MOTOROLA