MC68MH360ZP25VL Freescale Semiconductor, MC68MH360ZP25VL Datasheet - Page 131

• Manufacturer Part Number: MC68MH360ZP25VL
• Description: IC MPU QUICC ETHER 25MHZ 357PBGA
• Manufacturer: Freescale Semiconductor

Specifications of MC68MH360ZP25VL

• Processor Type: M683xx 32-Bit
• Speed: 25MHz
• Voltage: 3.3V
• Mounting Type: Surface Mount
• Package / Case: 357-PBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -

Appendix B
Frequently-Asked Questions
B0
B0
This appendix provides a list of frequently-asked questions and solutions for the MH360
and 860MH.
B.1 Questions Common to MH360 and 860MH
Q: What are the performance differences between the 68MH360 and 860MH?
A: Since the 860 and 360 have the same CPM, performance scales linearly with
Q: Comparing the MH360 and 860MH, what is the best way to support two T1 TDM
A: There are two bottlenecks in running the QMC protocol on the 360 and 860. One is
frequency as shown in Table B-1.
channels?
CPM performance, and the other is parameter RAM space.
Running the QMC protocol consumes nearly all of the CPM bandwidth at 25 MHz.
As the CPM is the same for the 360 and 860, the same limitation applies to both
when running at 25 MHz.
In addition, the QMC protocol consumes nearly all of the dual-ported RAM of a 360
preventing more than one QMC from running at the same time (even if the 360’s
speed could be increased).
However, since the 860 has twice as much dual-ported RAM as the 360, it does have
enough space to run two QMCs. Also, the CPM bandwidth is doubled at 50 MHz.
MH360
PowerQUICC
Freescale Semiconductor, Inc.
Device
For More Information On This Product,
Appendix B. Frequently-Asked Questions
Table B-1. CPU Performance
Go to: www.freescale.com
25 MHz
33 MHz
25 MHz
40 MHz
50 MHz
Frequency
6.3 Dhrystone MIPS
8.4 Dhrystone MIPS
33 Dhrystone MIPS
52 Dhrystone MIPS
66 Dhrystone MIPS
Performance