Datasheet

MPC8245 Integrated Processor Hardware Specifications, Rev. 10
Freescale Semiconductor 11
Electrical and Thermal Characteristics
4.2.1 Output Driver Characteristics
Table 4 provides information on the characteristics of the output drivers referenced in Table 16. The values
are preliminary estimates from an IBIS model and are not tested.
Capacitance V
in
= 0 V, f = 1 MHz C
in
— 16.0 pF
Notes:
1. See Table 16 for pins with internal pull-up resistors.
2. See Table 4 for the typical drive capability of a specific signal pin based on the type of output driver associated with that pin
as listed in Table 16.
3. These specifications are for the default driver strengths indicated in Table 4.
4. Leakage current is measured on input and output pins in the high-impedance state. The leakage current is measured for
nominal OV
DD
/LV
DD,
and V
DD
or both OV
DD
/LV
DD
and V
DD
must vary in the same direction.
Table 4. Drive Capability of MPC8245 Output Pins
5
Driver Type
Programmable
Output Impedance
(Ω)
Supply
Voltage
I
OH
I
OL
Unit Notes
DRV_STD_MEM 20 (default) OV
DD
= 3.3 V 36.6 18.0 mA 2, 4, 6
40 18.6 9.2 mA 2, 4, 6
DRV_PCI 20 12.0 12.4 mA 1, 3
40 (default) 6.1 6.3 mA 1, 3
DRV_MEM_CTRL 6 (default)
20
40
GV
DD
= 3.3 V 89.0 42.3 mA 2, 4
DRV_PCI_CLK 36.6 18.0 mA 2, 4
DRV_MEM_CLK 18.6 9.2 mA 2, 4
Notes:
1. For DRV_PCI, I
OH
read from the IBIS listing in the pull-up mode, I(Min) column, at the 0.33-V label by interpolating between
the 0.3- and 0.4-V table entries’ current values that correspond to the PCI V
OH
= 2.97 = 0.9 × OV
DD
(OV
DD
= 3.3 V) where
table entry voltage = OV
DD
– PCI V
OH
.
2. For all others with GV
DD
or OV
DD
= 3.3 V, I
OH
read from the IBIS listing in the pull-up mode, I(Min) column, at the 0.9-V table
entry that corresponds to the V
OH
= 2.4 V where table entry voltage = GV
DD
/OV
DD
– V
OH
.
3. For DRV_PCI, I
OL
read from the IBIS listing in the pull-down mode, I(Min) column, at 0.33 V = PCI V
OL
= 0 × OV
DD
(OV
DD
= 3.3 V) by interpolating between the 0.3- and 0.4-V table entries.
4. For all others with GV
DD
or OV
DD
= 3.3 V, I
OL
read from the IBIS listing in the pull-down mode, I(Min) column, at the 0.4-V
table entry.
5. See driver bit details for output driver control register (0x73) in the MPC8245 Integrated Processor Reference Manual.
6. See Chip Errata No. 19 in the MPC8245/MPC8241 RISC Microprocessor Chip Errata.
Table 3. DC Electrical Specifications (continued)
At recommended operating conditions (see Table 2)
Characteristic Condition
3
Symbol Min Max Unit Notes