MC68EN360AI25VL Freescale, MC68EN360AI25VL Datasheet - Page 515

• Manufacturer Part Number: MC68EN360AI25VL
• Manufacturer: Freescale

Specifications of MC68EN360AI25VL

• Family Name: M68000
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 25MHz
• Instruction Set Architecture: RISC
• Operating Supply Voltage (max): 3.3V
• Operating Supply Voltage (min): 2.7V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 240
• Package Type: FQFP
• Lead Free Status / RoHS Status: Compliant

Figure 7-55 shows the other LAN-type configuration of HDLC bus. In this configuration, a
master station transmits to any slave station, with no collisions possible. The slaves com-
municate only with the master, but may experience collisions in their access over the bus.
In this configuration, a slave that must communicate with another slave must first transmit
its data to the master, where the data is buffered in RAM and then retransmitted to the other
slave. The benefit of this configuration, however, is that full-duplex operation may be
obtained. This configuration is preferred in a point-to-multipoint environment.
NOTES:
NOTES:
1. Transceivers may be used to extend the LAN size, if necessary.
2. The TXD pins of slave devices should be configured to open-drain in the port C parallel I/O port.
RXD
1. Transceivers may be used to extend the LAN size, if necessary.
2. The TXD pins should be configured to open-drain in the port C parallel I/O port.
RXD
CONTROLLER
MASTER
CONTROLLER
HDLC
HDLC-BUS
Figure 7-55. HDLC Bus Single-Master Configuration
TXD
MASTER
A
Figure 7-54. HDLC Bus Multi-Master Configuration
TXD
A
Freescale Semiconductor, Inc.
CTS
For More Information On This Product,
MC68360 USER’S MANUAL
Go to: www.freescale.com
HDLC-BUS LAN
RXD
RXD
CONTROLLER
HDLC BUS
HDLC-BUS LAN
CONTROLLER
SLAVE
TXD
HDLC-BUS
MASTER
B
TXD
B
CTS
CTS
Serial Communication Controllers (SCCs)
RXD
RXD
CONTROLLER
HDLC BUS
CONTROLLER
SLAVE
HDLC-BUS
TXD
MASTER
C
TXD
C
CTS
CTS
R
R
+5
+5