參數資料
型號： MC68MH360CAI25L
廠商： Freescale Semiconductor
文件頁數： 41/158頁
文件大?。?/td> 0K
描述： IC MPU QUICC 25MHZ 240-FQFP
標準包裝： 24
系列： M683xx
處理器類型： M683xx 32-位
速度： 25MHz
電壓： 5V
安裝類型： 表面貼裝
封裝/外殼： 240-BFQFP
供應商設備封裝： 240-FQFP（32x32）
包裝： 托盤
Appendix B. Frequently-Asked Questions
transmit time slot 1, but virtual channel 5 could be assigned to receive time slot
1. Therefore, global loopback would cause the data transmitted on channel 1 to
be received on channel 5.
For loopback on an individual time slot, set bit 15 of the corresponding entry in
the SIRAM.
For the last two methods, use a common transmit/receive clock and transmit/receive
sync pulses. Also in these last two methods, if the loopbacked data is to be received
on the same virtual channel, make sure the transmit and receive portions of your SI
RAM entries match.
Q: Does the MH360 support signalling system 7 (SS-7) on all 32 channels?
A: No. The MH360 does not support SS-7. Run the SS-7 microcode on a normal
QUICC to get 4 channels of SS-7 support.
Q: Is any extra support logic required to attach an MH360 to an ISDN primary rate line?
A: Yes, a T1 transceiver and framer unit will be needed. Manufacturers include Dallas
Semiconductor, Mitel, and Level One.
Q: Can the MH360 be used as an ISDN basic rate terminator?
A: Yes, send multiple Motorola U Interface outputs into a single SCC using the QMC
controller and the Motorola IDL2.
Q: 360 documentation says that the time slot assigner can be used with all of the SCCs
and the SMCs. However, the MH360 reference manual states that the time slot
assigner works with the SCCs. Can the time slot assigner work with the SMCs?
A: Yes.
Q: What is the maximum bus latency at 25 MHz when using 32 64-Kbps channels?
A: Nine clocks. It is very important. At 25 MHz, the CPM is just able to empty the
FIFO quickly enough to prevent underrun. If the part is run at 33 MHz or if only 24
channels are needed, the margin increases allowing for a better worst case.
Q: Can TDMb be used for the QMC on the MH360?
A: Yes.
Q: Can the transparent channels of the MH360 (QMC mode) synchronize on an inline
data pattern?
A: No.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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