mcf5272 Freescale Semiconductor, Inc, mcf5272 Datasheet - Page 354

• Manufacturer Part Number: mcf5272
• Description: Mcf5272 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

Programming Model
14-16
3. Write QDLYR with the desired delays.
4. Write QIR with 0xD00F to enable write collision, abort bus errors, and clear any
5. Write QAR with 0x0020 to select the first command RAM entry.
6. Write QDR with 0x7E00, 0x7E00, 0x7E00, 0x7E00, 0x7D00, 0x7D00, 0x7D00,
7. Write QAR with 0x0000 to select the first transmit RAM entry.
8. Write QDR with sixteen 12-bit words of data.
9. Write QWR with 0x0F00 to set up a queue beginning at entry 0 and ending at entry
10. Set QDLYR[SPE] to enable the transfers.
11. Wait until the transfers are complete. QIR[SPIF] is set when the transfers are
12. Write QAR with 0x0010 to select the first receive RAM entry.
13. Read QDR to get the received data for each transfer.
14. Repeat steps 5 through 13 to do another transfer.
interrupts.
0x7D00, 0x7B00, 0x7B00, 0x7B00, 0x7B00, 0x7700, 0x7700, 0x7700, and 0x7700
to set up four transfers for each chip select. The chip selects are active low in this
example.
15.
complete.
MCF5272 User’s Manual
MOTOROLA