MC68EN360AI25VL Freescale, MC68EN360AI25VL Datasheet - Page 587

• 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

TC—Tx CRC
The following status bits are written by the Ethernet controller after it has finished transmit-
ting the associated data buffer.
DEF—Defer Indication
HB—Heartbeat
LC—Late Collision
RL—Retransmission Limit
RC—Retry Count
UN—Underrun
CSL—Carrier Sense Lost
Data Length
Tx Data Buffer Pointer
This bit is valid only when the L-bit is set; otherwise, it is ignored.
This frame had a collision before being successfully sent. Useful for channel statistics.
The collision input was not asserted within 20 transmit clocks following the completion of
transmission. This bit cannot be set unless the HBC bit is set in the PSMR.
A collision has occurred after the number of bytes defined with the LCW bit in the PSMR
(either 56 or 64) have been transmitted. The Ethernet controller will terminate the trans-
mission.
The transmitter has failed Retry Limit + 1 attempts to successfully transmit a message due
to repeated collisions on the medium.
These four bits indicate the number of retries required before this frame was successfully
transmitted. If RC = 0, then the frame was transmitted correctly the first time. If RC = 15
and RET_Lim = 15 in the parameter RAM, then 15 retries were required. If RC = 15 and
RET_Lim > 15 in the parameter RAM, then 15 or more retries were required.
The Ethernet controller encountered a transmitter underrun condition while transmitting
the associated data buffer.
Carrier sense was lost during frame transmission.
The data length is the number of octets the Ethernet controller should transmit from this
BD’s data buffer. It is never modified by the CP. The value of this field should be greater
than zero.
The transmit buffer pointer, which contains the address of the associated data buffer, may
be even or odd. The buffer may reside in either internal or external memory. This value is
never modified by the CP.
0 = End transmission immediately after the last data byte.
1 = Transmit the CRC sequence after the last data byte.
Freescale Semiconductor, Inc.
For More Information On This Product,
MC68360 USER’S MANUAL
Go to: www.freescale.com
Serial Communication Controllers (SCCs)