MC68MH360EM25L Freescale Semiconductor, MC68MH360EM25L Datasheet - Page 589

• Manufacturer Part Number: MC68MH360EM25L
• Description: IC MPU QUICC ETHER 25MHZ 240FQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68MH360EM25L

• Processor Type: M683xx 32-Bit
• Speed: 25MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 240-FQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -

7.10.23.21 ETHERNET MASK REGISTER (SCCM). The SCCM is referred to as the Ether-
net mask register when the SCC is operating as an Ethernet controller. It is a 16-bit read-
write register that has the same bit formats as the Ethernet event register. If a bit in the
Ethernet mask register is a one, the corresponding interrupt in the event register will be
enabled. If the bit is zero, the corresponding interrupt in the event register will be masked.
This register is cleared upon reset.
7.10.23.22 ETHERNET STATUS REGISTER (SCCS). This register is not valid for the
Ethernet protocol. The current state of the RENA and CLSN signals may be read in port C.
MOTOROLA
HDLC SCCE
ETHERNET SCCE
NOTES:
LEGEND:
TENA
CLSN
NOTES:
EVENTS
RENA
TXD
RXD
1. RXB event assumes receive buffers are 64 bytes each.
2. The RENA events, if required, must be programmed in the port C parallel I/O, not in the SCC itself.
3. The RXF interrupt may occur later than RENA due to receive FIFO latency.
1. TXB events assume the frame required two transmit buffers.
2. The GRA event assumes a GRACEFUL STOP TRANSMIT command was issued during frame transmission.
3. The TENA or CLSN events, if required, must be programmed in the port C parallel I/O, not in the SCC itself.
EVENTS
TRANSMITTED BY ETHERNET
RECEIVED IN ETHERNET
P = Preamble, SFD = Start Frame Delimiter, DA and SA = Source/Destination Address, T/L = Type/Length,
D = Data, and CR = CRC bytes.
TIME
FRAME
FRAME
LINE IDLE
LINE IDLE
Figure 7-72. Ethernet Interrupt Events Example
Freescale Semiconductor, Inc.
For More Information On This Product,
P
SFD
P
SFD DA SA T/L
DA SA T/L
MC68360 USER’S MANUAL
Go to: www.freescale.com
STORED IN RX BUFFER
TXB
TX BUFFER
STORED IN
D
RXB
D
CR
Serial Communication Controllers (SCCs)
CR
RXF
GRA
TXB
LINE IDLE
LINE IDLE
;
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