參數(shù)資料
型號： MC68MH360ZQ33LR2
廠商： Freescale Semiconductor
文件頁數(shù)： 40/158頁
文件大?。?/td> 0K
描述： IC MPU QUICC 33MHZ 357-PBGA
標準包裝： 180
系列： M683xx
處理器類型： M683xx 32-位
速度： 33MHz
電壓： 5V
安裝類型： 表面貼裝
封裝/外殼： 357-BBGA
供應商設備封裝： 357-PBGA（25x25）
包裝： 帶卷 (TR)
QMC Supplement
B.3 MH360-Related Questions
Q: Does the MH360 still have a full Ethernet controller?
A: Yes.
Q: What frequency MH360 is required to support 10-Mbps Ethernet and 64-channel
QMC on a 2.048-Mbps TDM?
A: A 33-MHz MH360 is required.
Q: How should an MH360 be congured to run both 2.048-Mbps QMC and 10-Mbps
Ethernet?
A: Put Ethernet on SCC1 and split the TDM time slot—16 channels on SCC2 and 16
on SCC3.
Q: When the part has the core disabled (68040 companion mode), will it support both
the Ethernet and a 32-channel QMC when clocked at 25 MHz? If not, how many
QMC channels will it handle?
A: A 33-MHz part is needed to run 32-channel QMC and Ethernet. A 25-MHz MH360
can support 24-channel QMC and Ethernet. The bottleneck is in the CPM
performance not the CPU.
Q: Is the pinout for the MH360 the same as the standard 360?
A: Yes.
Q: Can two GCI ports be connected to an MH360?
A: Yes, with some caveats. Run each GCI channel into a TSA. Then use SCC1 for the
two B channels and SCC2 for the other two B channels. Finally, use SCC3 and SCC4
for the respective D channels. However, this method provides no support for M-, C/
I-, A-, or E-channels.
Q: What are the differences in loopback modes for the time slot assigner, particularly
with respect to the MH360?
A: There are three ways to do loopback:
Use the GSMR to make all 32 virtual channels loop back as they pass through
the SCC. Each virtual channel will transmit through the SCC in the order dened
in the transmit portion of the SI RAM. The transmit side of the virtual channel
will loop back directly into the receive side of the virtual channel with no
indirection by the SI.
Use the SIMODE to cause global loopback of the multiplexed data stream in the
SI. By this method, the rst transmit time slot will loop back into the rst receive
time slot, etc. However, different time slots can be assigned to different virtual
channels in the SI RAM. For example, virtual channel 1 could be assigned to
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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