User`s guide

Understanding the IBIS Model
i.MX53 System Development User’s Guide, Rev. 1
Freescale Semiconductor 3-3
Example 3-2. Component and Pin Information
[Component] iMX53
[Manufacturer] FREESCALE
[Package]
| variable typ min max
R_pkg 0.2406012 0.0866665 0.3239850
L_pkg 3.72366nH 1.35844nH 6.31610nH
C_pkg 1.08882pF 0.40570pF 1.70556pF
|
[Pin] signal_name model_name R_pin L_pin C_pin
A1 GND GND NA NA NA
A2 GND GND NA NA NA
A3 GPIO_17 uhvio 0.314809 5.06836nH 1.34352pF
A4 GPIO_7 uhvio 0.306893 5.63292nH 1.11136pF
A5 GPIO_5 uhvio 0.295459 4.67265nH 1.18268pF
Model Information
The [Model Selector] keyword is a simple means by which several buffers can be made optionally
available for simulation at the same physical pin of the component.
[Pin] signal_name model_name R_pin L_pin C_pin
AA4 JTAG_TDI gpio 0.307112 5.51128nH 0.40126pF
…
[Model Selector] gpio
gpio_iods0hvf GPIO, 2.7V, Low Drive, Fast SR
gpio_iods0hvs GPIO, 2.7V, Low Drive, Slow SR
[Manufacturer] Yes The name of the component manufacturer
[Package] Yes This keyword contains the range (minimum, typical and maximum values) over which the
packages’ lead resistance, inductance, and capacitance vary (the R_pkg, L_pkg, and
C_pkg parameters).
[Pin] Yes This keyword contains the pin-to-buffer mapping information. In addition, the model creator
can use this keyword to list the R, L, and C data for each individual pin (R_pin, L_pin, and
C_pin parameters).
[Package Model] No If the component model includes an external package model (or uses the [Define Package
Model] keyword within the IBIS file itself), this keyword indicates the name of that package
model.
[Pin Mapping] No This keyword is used if the model creator wishes to include information on buffer power and
ground connections. This information may be used for simulations involving multiple outputs
switching.
[Diff Pin] No This keyword is used to associate buffers that should be driven in a complementary fashion
as a differential pair.
Table 3-2. Component and Pin Information (continued)
Keyword Required Comment