Power Characteristics
2.1.4 Output Driver Characteristics
provides information on the characteristics of the output driver strengths. The values are
preliminary estimates.
Table 3. Output Drive Capability
Driver Type
Programmable
Output Impedance
(Ω)
25
42 (default)
PCI signals
25
42 (default)
DDR signal
TSEC/10/100 signals
DUART, system control, I2C, JTAG
RapidIO N/A (LVDS signaling)
20
42
42
N/A
GV
DD
= 2.5 V
LV
DD
= 2.5/3.3 V
OV
DD
= 3.3 V
2
Supply
Voltage
OV
DD
= 3.3 V
Notes
Local bus interface utilities signals
1
Notes:
1. The drive strength of the local bus interface is determined by the configuration of the appropriate bits in
PORIMPSCR.
2. The drive strength of the PCI interface is determined by the setting of the PCI_GNT1 signal at reset.
3 Power Characteristics
The estimated power dissipation on the V
DD
supply for the MPC8540 is shown in
Table 4. MPC8540 V
DD
Power Dissipation
1,2
CCB Frequency
(MHz)
200
Core
Typical Power
3,4
Frequency (MHz)
400
500
600
267
533
667
800
4.6
4.9
5.3
5.5
5.9
6.4
Maximum
Power
5
7.2
7.5
7.9
8.2
8.7
10.2
W
Unit
W
MPC8540 Integrated Processor Hardware Specifications, Rev. 4
Freescale Semiconductor
11
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
