MC68HC912BD32 Datasheet, PDF (192/292 Pages) Freescale Semiconductor, Inc – Advance Information

Freescale Semiconductor, Inc.
Byteflight™ Module
CPU WAIT Mode
The WAIT instruction places the MCU in the low-power consumption
WAIT mode. Depends on the SSWAI-bit the module can be stopped or
remains active during CPU wait mode. When SSWAI is cleared the
module will stay synchronized to the Byteflight™ and can generate
interrupts to the CPU if enabled. Any such interrupt will bring the MCU
out of wait mode.
CPU STOP Mode
A CPU STOP instruction stops the internal oscillator and halts all internal
processing. The application software has to bring the module into the
module sleep mode before the CPU STOP instruction is executed if the
Byteflight™ has to wake up the CPU. The processor can be brought out
of the STOP mode only by an external interrupt, RESET or WAKEUP
interrupt of the module.
SOFT RESET Mode
In Soft Reset Mode, the Byteflight™ module is stopped. Registers can
still be accessed. This mode is used to initialize the module
configuration.
When setting the SFTRES bit, the Byteflight™ module immediately
stops all ongoing transmission and reception, potentially causing
protocol violations. The user is required to take care that the Byteflight™
is not active when Soft Reset Mode is entered. The recommended
procedure is to bring the Byteflight™ module into Sleep Mode before the
SFTRES bit is set.
MC68HC912BD32 Rev 1.0
Byteflight™ Module
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