KMC7457VG1267LC Freescale Semiconductor, KMC7457VG1267LC Datasheet - Page 49

• Manufacturer Part Number: KMC7457VG1267LC
• Description: IC MPU RISC 32BIT 1267MHZ 483BGA
• Manufacturer: Freescale Semiconductor

Specifications of KMC7457VG1267LC

• Processor Type: MPC74xx PowerPC 32-Bit
• Speed: 1.267GHz
• Voltage: 1.3V
• Mounting Type: Surface Mount
• Package / Case: 483-FCCBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

9
This section provides system and thermal design recommendations for successful application of the
MPC7457.
9.1
The following sections provide more detailed information regarding the clocking of the MPC7457.
9.1.1
The MPC7457 PLL is configured by the PLL_CFG[0:4] signals. For a given SYSCLK (bus) frequency,
the PLL configuration signals set the internal CPU and VCO frequency of operation. The PLL
configuration for the MPC7457 is shown in
shaded cells represent settings that, for a given SYSCLK frequency, result in core and/or VCO frequencies
that do not comply with the 1-GHz column in
some earlier MPC7450-family devices and care should be taken when upgrading to the MPC7457 to verify
the correct PLL settings for an application.
Freescale Semiconductor
PLL_CFG[0:4]
01000
10000
10100
10110
10010
11010
01010
00100
00010
11000
01100
System Design Information
Clocks
Table 18. MPC7457 Microprocessor PLL Configuration Example for 1267 MHz Parts
Core Clocks and PLL Configuration
Multiplier
Bus-to-
Core
5.5x
6.5x
7.5x
8.5x
2x
3x
4x
5x
6x
7x
8x
MPC7457 RISC Microprocessor Hardware Specifications, Rev. 7
Multiplier
Core-to-
VCO
2x
2x
2x
2x
2x
2x
2x
2x
2x
2x
2x
MHz
33.3
Example Bus-to-Core Frequency in MHz (VCO Frequency in MHz)
Table 18
Table
MHz
50
8. Note that these configurations were different in
for a set of example frequencies. In this example,
MHz
66.6
Bus (SYSCLK) Frequency
(1200)
(1276)
MHz
600
638
75
(1245)
(1328)
(1412)
MHz
623
664
706
83
(1200)
(1300)
(1400)
(1500)
(1600)
(1700)
MHz
100
600
650
700
750
800
850
System Design Information
(1333)
(1466)
(1600)
(1730)
(1862)
(2000)
(2128)
(2261)
1000
1064
1131
MHz
133
667
733
800
866
931
(1333)
(1670)
(1837)
(2004)
(2171)
(2338)
(2505)
1002
1086
1169
1253
MHz
167
667
835
919
49