MC68MH360RC25L Freescale Semiconductor, MC68MH360RC25L Datasheet - Page 134

• Manufacturer Part Number: MC68MH360RC25L
• Description: IC MPU QUICC 25MHZ 241-PGA
• Manufacturer: Freescale Semiconductor

Specifications of MC68MH360RC25L

• Processor Type: M683xx 32-Bit
• Speed: 25MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 241-PGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

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
A: A 33-MHz MH360 is required.
Q: How should an MH360 be configured to run both 2.048-Mbps QMC and 10-Mbps
A: Put Ethernet on SCC1 and split the TDM time slot—16 channels on SCC2 and 16
Q: When the part has the core disabled (68040 companion mode), will it support both
A: A 33-MHz part is needed to run 32-channel QMC and Ethernet. A 25-MHz MH360
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
Q: What are the differences in loopback modes for the time slot assigner, particularly
A: There are three ways to do loopback:
QMC on a 2.048-Mbps TDM?
Ethernet?
on SCC3.
the Ethernet and a 32-channel QMC when clocked at 25 MHz? If not, how many
QMC channels will it handle?
can support 24-channel QMC and Ethernet. The bottleneck is in the CPM
performance not the CPU.
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.
with respect to the MH360?
• Use the GSMR to make all 32 virtual channels loop back as they pass through
• Use the SIMODE to cause global loopback of the multiplexed data stream in the
the SCC. Each virtual channel will transmit through the SCC in the order defined
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.
SI. By this method, the first transmit time slot will loop back into the first 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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QMC Supplement