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PDF MC7448Txx Data sheet ( Hoja de datos )
| Número de pieza | MC7448Txx | |
| Descripción | Hardware Specifications Addendum | |
| Fabricantes | Freescale Semiconductor | |
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Freescale Semiconductor
Technical Data
Document Number: MPC7448ECS02AD
Rev. 2, 04/2007
MPC7448 Hardware Specifications
Addendum for the
MC7448Txxnnnnmx Series
This document describes part-number-specific changes to
recommended operating conditions and revised electrical
specifications, as applicable, from those described in the
general MPC7448 RISC Microprocessor Hardware
Specifications. The MPC7448 is a PowerPC™
www.DataSheet4U.commicroprocessor built on Power Architecture™ technology.
Specifications provided in this document supersede those in
the MPC7448 RISC Microprocessor Hardware
Specifications, Rev. 3 or later, for the part numbers listed in
Table A only. Specifications not addressed herein are
unchanged. Because this document is frequently updated,
refer to the website on the back page of this document or to
your Freescale sales office for the latest version.
Note that headings and table numbers in this document are
not consecutively numbered. They are intended to
correspond to the heading or table affected in the general
hardware specification.
Part numbers addressed in this document are listed in
Table A.
Freescale Part Numbers Affected:
MC7448THX1000Nx
MC7448THX1267Nx
MC7448THX1400Nx
MC7448THX1700LD
PPC7448THX1000Nx
PPC7448THX1267Nx
PPC7448THX1400Nx
© Freescale Semiconductor, Inc., 2007. All rights reserved.
1 page  
General Parameters
Table 8. Clock AC Timing Specifications
At recommended operating conditions. See Table 4.
Maximum Processor Core Frequency (MHz)
Characteristic
Symbol
1000N
1267N
1400N
1700L
Unit Notes
Min Max Min Max Min Max Min Max
Processor frequency
DFS mode disabled
fcore 500 1000 500 1267 500 1400 600 1700 MHz 1, 8, 9
Processor frequency
fcore_DFS 250 500 250 633 250 700 300 850 MHz 10
DFS mode enabled
VCO frequency
fVCO
500 1000 500 1267 500 1400 600 1700 MHz 1, 9
Notes:
1. Caution: The SYSCLK frequency and PLL_CFG[0:5] settings must be chosen such that the resulting SYSCLK (bus)
frequency, processor core frequency, and PLL (VCO) frequency do not exceed their respective maximum or minimum
operating frequencies. Refer to the PLL_CFG[0:5] signal description in Section 9.1.1, “PLL Configuration,” in the hardware
specifications for valid PLL_CFG[0:5] settings.
8. This reflects the maximum and minimum core frequencies when the dynamic frequency switching feature (DFS) is disabled.
fcore_DFS provides the maximum and minimum core frequencies in a DFS mode.
9. Caution: These values specify the maximum processor core and VCO frequencies when the device is operated at the
nominal core voltage. If operating the device at the derated core voltage, the processor core and VCO frequencies must be
reduced. See Section 5.3, “Voltage and Frequency Derating,” for more information.
10.This specification supports the Dynamic Frequency Switching (DFS) feature and is applicable only when one of the DFS
modes (divide-by-2 or divide-by-4) is enabled. When DFS is disabled, the core frequency must conform to the maximum and
minimum frequencies stated for fcore.
5.3 Voltage and Frequency Derating
To reduce power consumption, these devices support voltage and frequency derating in which the core
voltage (VDD) may be reduced if the reduced maximum processor core frequency requirements are
observed. The supported derated core voltage, resulting maximum processor core frequency (fcore), and
power consumption are provided in Table 11. Only those parameters in Table 11 are affected; all other
parameter specifications are unaffected.
Table 11. Supported Voltage, Core Frequency, and Power Consumption Derating
Maximum Rated
Core Frequency
(Device Marking)
1000N
1267N
1400N
1700L
Supported
Derated Core
Voltage (VDD)
1.0 V ± 50 mV
1.0 V ± 50 mV
Maximum Derated
Core Frequency
(fcore)
Full-Power Mode Power Consumption
Typical
Thermal
Maximum
N/A
1000 MHz
6.0 W
7.3 W
8.5 W
1000 MHz
8.0 W
9.9 W
11.5 W
N/A
MPC7448 Hardware Specifications Addendum for the MC7448Txxnnnnmx Series, Rev. 2
Freescale Semiconductor
5
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