mcf5274l Freescale Semiconductor, Inc, mcf5274l Datasheet - Page 13

• Manufacturer Part Number: mcf5274l
• Description: Mcf5275 Integrated Microprocessor Family Hardware
• Manufacturer: Freescale Semiconductor, Inc

3.12 QSPI
The queued serial peripheral interface module provides a serial peripheral interface with queued transfer
capability. It allows users to enqueue up to 16 transfers at once, eliminating CPU intervention between
transfers. Transfer RAMs in the QSPI are indirectly accessible using address and data registers.
The QSPI contains the following features:
3.13 DMA Timers (DTIM0-DTIM3)
There are four independent, general purpose 32-bit platform timers (DTIM0, DTIM1, DTIM2, DTIM3)
on the MCF5275 family of microprocessors. The output of an 8-bit prescaler clocks each timer.
Each of the platform timer modules has these distinctive features:
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Multiple-master operation
Software programmable for one of 64 different serial clock frequencies
Software selectable acknowledge bit
Interrupt driven, byte-by-byte data transfer
Arbitration lost interrupt with automatic mode switching from master to slave
Calling address identification interrupt
Start and stop signal generation/detection
Repeated START signal generation
Acknowledge bit generation/detection
Bus-busy detection
DMA support
Programmable queue to support up to 16 transfers without user intervention
Supports transfer sizes of 8 to 16 bits in 1-bit increments
Four peripheral chip-select lines
Baud rates from 162.1 Kbps to 20.75 Mbps at 83 MHz
Programmable delays before and after transfers
Programmable clock phase and polarity
Supports wraparound mode for continuous transfers
Programmable sources for the clock input, including external clock
Input capture capability with programmable trigger edge on input pin
Output compare with programmable mode for the output pin
Free run and restart modes
Maskable interrupts on input capture or reference compare
DMA support
MCF5275 Integrated Microprocessor Family Hardware Specification, Rev. 1.1
Preliminary
Features
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