MC9S08EL32 Datasheet, PDF (187/356 Pages) Freescale Semiconductor, Inc – 8-Bit HCS08 Central Processor Unit (CPU)

will clear INITACK after the module has left reset mode and the SLIC will seek the next LIN header. It is
the responsibility of the user to verify that this operation is compatible with the application before
implementing this feature.
In this mode, the internal SLIC module voltage references are operative, V_DD is supplied to the internal
circuits, which are held in their reset state and the internal SLIC module system clock is running. Registers
will assume their reset condition. Outputs are held in their programmed reset state, inputs and network
activity are ignored.
12.1.2.3 SLIC Disabled
This mode is entered from the reset mode after all MCU reset sources are no longer asserted or INITREQ
is cleared by the user and the SLIC module clears INITACK. It is entered from the run mode whenever
SLCE in SLCC2 is cleared. In this mode the SLIC clock is stopped to conserve power and allow the SLIC
module to be configured for proper operation on the LIN bus.
12.1.2.4 SLIC Run
This mode is entered from the SLIC disabled mode when SLCE in SLCC2 is set. It is entered from the
SLIC wait mode whenever activity is sensed on the LIN bus or some other MCU source wakes the CPU
out of wait mode.
It is entered from the SLIC stop mode whenever network activity is sensed or some other MCU source
wakes the CPU out of stop mode. Messages will not be received properly until the clocks have stabilized
and the CPU is also in the run mode.
12.1.2.5 SLIC Wait
This power conserving mode is automatically entered from the run mode whenever the CPU executes a
WAIT instruction and SLCWCM in SLCC1 is previously cleared. In this mode, the SLIC module internal
clocks continue to run. Any activity on the LIN network will cause the SLIC module to exit SLIC wait
mode and return to SLIC run. No activity for an a time on the LIN bus will also cause the No Bus Activity
Interrupt source to occur. This will also cause an exit from SLIC wait mode.
12.1.2.6 Wakeup from SLIC Wait with CPU in WAIT
If the CPU executes the WAIT instruction and the SLIC module enters the wait mode (SLCWCM = 0), the
clocks to the SLIC module as well as the clocks in the MCU continue to run. Therefore, the message that
wakes up the SLIC module from WAIT and the CPU from wait mode will also be received correctly by
the SLIC module. This is because all of the required clocks continue to run in the SLIC module in wait
mode.
12.1.2.7 SLIC Stop
This power conserving mode is automatically entered from the run mode whenever the CPU executes a
STOP instruction, or if the CPU executes a WAIT instruction and SLCWCM in SLCC1 is previously set.
In this mode, the SLIC internal clocks are stopped. If SLIC interrupts are enabled (SLCIE = 1) prior to
MC9S08EL32 Series and MC9S08SL16 Series Data Sheet, Rev. 3
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