MC68EN360AI25VL Freescale, MC68EN360AI25VL Datasheet - Page 530

• 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

Serial Communication Controllers (SCCs)
CLOSE Rx BD Command . The CLOSE Rx BD command is used to force the SCC to close
the current Rx BD, if it is currently being used, and to use the next BD for any subsequent
data that is received. If the SCC is not in the process of receiving data, no action is taken by
this command.
INIT RX PARAMETERS Command . This command initializes all the receive parameters in
this serial channel’s parameter RAM to their reset state. This command should only be
issued when the receiver is disabled. Note that the INIT TX AND RX PARAMETERS com-
mand may also be used to reset both receive and transmit parameters.
7.10.20.6 BISYNC CONTROL CHARACTER RECOGNITION. The BISYNC controller can
recognize special control characters. These characters are used to customize the BISYNC
protocol implemented by the BISYNC controller and may be used to aid its operation in a
DMA-oriented environment. Their main use is for receive buffers longer than one byte. In
single-byte buffers, each byte can easily be inspected, and control character recognition
should be disabled.
The purpose of the control characters table is to enable automatic recognition (by the
BISYNC controller) of the end of the current block. Since the BISYNC controller imposes no
restrictions on the format of the BISYNC blocks, user software must respond to the received
characters and inform the BISYNC controller of mode changes and certain protocol events
(e.g., resetting the BCS). However, correct use of the control characters table allows the
remainder of the block to be received without interrupting the user software.
Up to 8 control characters may be defined. These characters inform the BISYNC controller
that the end of the current block has been reached and whether a BCS is expected following
this character. For example, the end of text (ETX) character implies an end of block (ETB)
with a subsequent BCS. An enquiry (ENQ) character designates an end of block without a
subsequent BCS. All the control characters are written into the data buffer.
The BISYNC controller uses a table of 16-bit entries to support control character recognition.
Each entry consists of the control character, an end-of-table bit, a BCS expected bit, and a
hunt mode bit. The RCCM entry is used to define classes of control characters with a mask-
ing option.
7-206
OFFSET + 10
OFFSET + E
OFFSET + 0
OFFSET + 2
OFFSET + 4
OFFSET + 6
15
E
E
E
E
E
1
14
B
B
B
B
B
1
13
H
H
H
H
H
1
Freescale Semiconductor, Inc.
For More Information On This Product,
12
MC68360 USER’S MANUAL
11
Go to: www.freescale.com
10
9
8
•
•
7
6
5
MASK VALUE(RCCM)
CHARACTER1
CHARACTER2
CHARACTER3
CHARACTER8
4
3
2
1
0