mc68hc08az60 Freescale Semiconductor, Inc, mc68hc08az60 Datasheet - Page 228

• Manufacturer Part Number: mc68hc08az60
• Description: M68hc08 Family Of 8-bit Microcontroller Units Mcus
• Manufacturer: Freescale Semiconductor, Inc

Serial Peripheral Interface Module (SPI)
MC68HC08AZ60 — Rev 1.0
228
The mode fault enable bit (MODFEN) can prevent the MODF flag from
being set so that only the OVRF flag is enabled to generate
receiver/error CPU interrupt requests.
Two sources in the SPI status and control register can generate CPU
interrupt requests:
1. SPI receiver full bit (SPRF) — The SPRF bit becomes set every
2. SPI transmitter empty (SPTE) — The SPTE bit becomes set every
Freescale Semiconductor, Inc.
ERRIE
MODF
OVRF
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time a byte transfers from the shift register to the receive data
register. If the SPI receiver interrupt enable bit, SPRIE, is also set,
SPRF can generate an SPI receiver/error CPU interrupt request.
time a byte transfers from the transmit data register to the shift
register. If the SPI transmit interrupt enable bit, SPTIE, is also set,
SPTE can generate an SPTE CPU interrupt request.
Serial Peripheral Interface Module (SPI)
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Figure 8. SPI Interrupt Request Generation
SPRIE
SPTE
SPTIE
SPRF
SPE
SPI TRANSMITTER
CPU INTERRUPT REQUEST
SPI RECEIVER/ERROR
CPU INTERRUPT REQUEST
MOTOROLA
18-spi