MC68MH360EM25L Freescale Semiconductor, MC68MH360EM25L Datasheet - Page 591

• 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: -

After 14 bytes and the 46 bytes of automatic pad (plus the 4 bytes of CRC) have been trans-
mitted, the Tx BD is closed. Additionally, the receive buffer is closed after a frame is re-
ceived. Any additional receive data beyond 1520 bytes or a single frame will cause a busy
(out-of-buffers) condition since only one Rx BD was prepared.
MOTOROLA
20. Clear GADDR1–GADDR4. The group hash table is not
21. Write PADDR1_H with $0000, PADDR1_M with $0000, and PADDR1_L
22. Write P_Per with $0000. It is not used.
23. Clear IADDR1–IADDR4. The individual hash table is not
24. Clear TADDR_H, TADDR_M, and TADDR_L for the sake of clarity.
25. Initialize the Rx BD. Assume the Rx data buffer is at $00001000 in main memory.
26. Initialize the Tx BD. Assume the Tx data frame is at $00002000 in main memory
27. Write $FFFF to the SCCE to clear any previous events.
28. Write $001A to the SCCM to enable the TXE, RXF, and TXB interrupts.
29. Write $40000000 to the CIMR to allow SCC1 to generate a system interrupt. (The
30. Write $00000000 to GSMR_H1 to enable normal operation of all modes.
31. Write $1088000C to GSMR_L1 to configure the CTS (CLSN) and CD (RENA) pins
32. Write $D555 to DSR
33. Set the PSMR1 to $0A0A to configure 32-bit CRC, promiscuous mode (receive all
34. Enable the TENA pin (RTS). Since the MODE bits in GSMR have been written
35. Write $1088003C to GSMR_L1 to enable the SCC1 transmitter and receiver. This
used.
with $0040 to configure the physical address.
used.
Write $B000 to Rx_BD_Status. Write $0000 to Rx_BD_Length (not required—
done for instructional purposes only). Write $00001000 to Rx_BD_Pointer.
and contains fourteen 8-bit characters (destination and source addresses plus
the type field). Write $FC00 to Tx_BD_Status. Add PAD to the frame and
generate a CRC. Write $000D to Tx_BD_Length. Write $00002000 to
Tx_BD_Pointer.
CICR should also be initialized.)
to automatically control transmission and reception (DIAG bits) and the Ethernet
mode. TCI is set to allow more setup time for the EEST to receive the QUICC’s
transmit data. TPL and TPP are set as required for Ethernet. The DPLL is not used
with Ethernet. Notice that the transmitter (ENT) and receiver (ENR) have not been
enabled yet.
frames), and begin searching for the start frame delimiter 22 bits after RENA.
to Ethernet, the TENA signal is low. Write PCPAR bit 0 with a one. Write
PCDIR bit 0 with a zero.
additional write ensures that the ENT and ENR bits will be enabled last.
Freescale Semiconductor, Inc.
For More Information On This Product,
MC68360 USER’S MANUAL
Go to: www.freescale.com
NOTE
Serial Communication Controllers (SCCs)
7-267