MC68MH360RC25L Freescale Semiconductor, MC68MH360RC25L Datasheet - Page 22

• 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: -

1.6 QMC Serial Routing and Example Applications
The QMC protocol provides multiple logical channels from a single SCC. The SCC
channel dedicated to operate the QMC protocol should have all the relevant bits or time
slots routed to it. Individual logical channels are selected by a combination of signals routed
through the TDM and tables within the QMC protocol. Contrasting a non-QMC example
application with QMC implementations highlights benefits of the multichannel protocol.
Figure 1-2 shows an Ethernet-to-BRI bridge using an MC68EN360, a non-QMC device.
The configuration shows the Ethernet routed via an NMSI interface to SCC1. The ISDN
BRI is routed via the TSA over an IDL2
and D) channels. The first byte of the frame (B1) is routed to SCC2, the second byte (B2)
to SCC3, and then the next two bits (the D channel) to SCC4. In this example, SMC2 is
used to connect to a PC over RS232. The internal routing is illustrated in Figure 1-3. Note
that three SCCs are required to implement the ISDN BRI. This uses all the MC68EN360’s
serial channels without efficient use of the CPM bandwidth.
4-Wire
ISDN
Line
1
Motorola ISDN S/T transceiver MC145474.
The IDL2 interface is a full duplex ISDN interface used to interface to a physical layer device, such as the
MC145574
Figure 1-2. Ethernet-to-BRI Bridge Using MC68EN360
Freescale Semiconductor, Inc.
For More Information On This Product,
IDL2
Go to: www.freescale.com
SCC2
SCC3
SCC4
SPI
TSA
MC68EN360
QMC Supplement
1
interface to SCC2–SCC4 for the 2 B + D (B1, B2,
SCC1
SMC2
Ethernet
UART
MC68160
RS232
To LAN
To PC