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QSPI-enhanced features are as follows:
• Programmable Queue — up to 32 preprogrammed transfers
• Programmable Peripheral Chip-Selects — four pins select up to 16 SPI chips
• Wraparound Transfer Mode — for autoscanning of serial A/D (or other) peripherals,
with no CPU overhead
• Programmable Transfer Length — from 8–16 bits inclusive
• Programmable Transfer Delay — from 0.6 µs to 0.3 µs (at 28 MHz)
• Programmable Queue Pointer
• Continuous Transfer Mode — up to 256 bits
• Optional on-chip expanded QSPI chip selects
Standard SCI features are listed below, followed by a list of additional features offered.
Standard SCI two-wire system features:
• Standard nonreturn-to-zero (NRZ) mark/space format
• Advanced error detection mechanism (detects noise duration up to 1/16 of a
bit-time)
• Full-duplex operation
• Software selectable word length (8- or 9-bit words)
• Separate transmitter and receiver enable bits
• May be interrupt driven
• Four separate interrupt enable bits
• Two independent operating SCI modules
Standard SCI receiver features:
• Receiver wakeup function (idle or address mark bit)
• Idle-line detect
• Framing, noise, and overrun error detect
• Receive data register full flag
Standard SCI transmitter features:
• Transmit data register empty flag
• Transmit complete flag
• Send break
QSMCM-additional SCI features:
• 13-bit programmable baud-rate modulus counter
• Even/odd parity generation and detection
MOTOROLA
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Chapter 15. Queued Serial Multi-Channel Module
Key Features
15-3
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