MC68HC912BD32 Datasheet, PDF (205/292 Pages) Freescale Semiconductor, Inc – Advance Information

35-sibus
Freescale Semiconductor, Inc.
Byteflight™ Module
Programmer’s Model
SLPACK — Sleep Acknowledge
This read-only bit indicates that the interface has reached the sleep
mode state. This allows an accurate shut off of the module before the
shut off of the remaining system.
1 = Module is in sleep mode.
0 = Module is in normal run mode.
SLPRQ — Sleep request, enter Low Power Module Sleep Mode
This bit requests the module to enter sleep mode, the clock will be
stopped. This allows the module to be shut off when not in use. The
CPU can still access the Module Configuration Register. If SLPRQ is
asserted in the middle of transmission or reception of a message or is
asserted while the temporary message buffers are full, the clock will
be stopped at the end of this message, respectively when the
temporarily buffers are empty. It remains stopped until a wakeup
occurs.
1 = Enter Low Power Sleep Mode.
0 = Normal Mode.
WPULSE — Wakeup Pulses
This bit causes to transmit wakeup pulses with the pulse width of
t_wake_up. The wakeup sequence is used to wakeup the transceiver
from sleep mode. Writing to this bit is allowed during soft reset only.
1 = The interface generates wakeup pulses.
0 = The interface does not generate wakeup pulses.
t_wake_up
t_wake_up
Figure 37 Wakeup Pulses
SSWAI — Serial Bus Interface Stops in Wait Mode
1 = The module ceases to be clocked during WAIT mode.
0 = The module is not affected during WAIT mode.
Byteflight™ Module
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MC68HC912BD32 Rev 1.0