MC908GR8CDWE Datasheet, PDF (74/408 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Freescale Semiconductor, Inc.
Resets and Interrupts
• Noise flag (NF) — NF is set when the SCI detects noise on
incoming data or break characters, including start, data, and stop
bits. The noise error interrupt enable bit, NEIE, enables NF to
generate SCI error CPU interrupt requests. NF is in SCI status
register 1. NEIE is in SCI control register 3.
• Framing error bit (FE) — FE is set when a logic 0 occurs where the
receiver expects a stop bit. The framing error interrupt enable bit,
FEIE, enables FE to generate SCI error CPU interrupt requests.
FE is in SCI status register 1. FEIE is in SCI control register 3.
• Parity error bit (PE) — PE is set when the SCI detects a parity error
in incoming data. The parity error interrupt enable bit, PEIE,
enables PE to generate SCI error CPU interrupt requests. PE is in
SCI status register 1. PEIE is in SCI control register 3.
4.4.2.9 KBD0–KBD4 Pins
A logic 0 on a keyboard interrupt pin latches an external interrupt
request.
4.4.2.10 ADC (Analog-to-Digital Converter)
When the AIEN bit is set, the ADC module is capable of generating a
CPU interrupt after each ADC conversion. The COCO/IDMAS bit is not
used as a conversion complete flag when interrupts are enabled.
4.4.2.11 TBM (Timebase Module)
The timebase module can interrupt the CPU on a regular basis with a
rate defined by TBR2–TBR0. When the timebase counter chain rolls
over, the TBIF flag is set. If the TBIE bit is set, enabling the timebase
interrupt, the counter chain overflow will generate a CPU interrupt
request.
Interrupts must be acknowledged by writing a logic 1 to the TACK bit.
Technical Data
74
MC68HC908GR8 — Rev 4.0
Resets and Interrupts
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