PCX755BVZFU300LE Atmel, PCX755BVZFU300LE Datasheet - Page 43

• Manufacturer Part Number: PCX755BVZFU300LE
• Description: IC MPU 32BIT 300MHZ 360PBGA
• Manufacturer: Atmel

Specifications of PCX755BVZFU300LE

• Processor Type: PowerPC 32-Bit RISC
• Speed: 300MHz
• Voltage: 2V
• Mounting Type: Surface Mount
• Package / Case: 360-PBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -

2138G–HIREL–05/06
Figure 10-3. Driver Impedance Measurement Circuit
Alternately, the following is another method to determine the output impedance of the PC755. A
voltage source, V
low, the voltage source is set to a value that is equal to (L2)O
V
is divided by the measured current to determine the output impedance of the pull-down device,
R
the pull-up, (L2)O
equal to (L2)O
or with data from simulation models, such as IBIS.
R
Figure 10-4
Figure 10-4. Alternate Driver Impedance Measurement Circuit
force
N
P
. Similarly, the impedance of the pull-up device is determined by dividing the voltage drop of
and R
is measured. The voltage drop across the pull-down device, which is equal to (L2)O
N
are designed to be close to each other in value. Then Z
describes the alternate driver impedance measurement circuit.
V
DD
force
/2. This method can be employed with either empirical data from a test set up
V
DD
, is connected to the output of the PC755 as in
/2, by the current sank by the pull-up when the data is high and V
Data
Data
(L2)OV
(L2)OV DD
OGND
DD
Pad
R
R
(L2)OV
N
P
OGND
BGA
Pin
DD
V
DD
SW2
SW1
/2 and the current sourced by
0
= (R
Vforce
Figure
P
+ R
PC755/745
N
10-4. Data is held
)/2.
V
force
DD
/2,
43
is