MC68HC908QL4 Datasheet, PDF (136/226 Pages) Motorola, Inc – Microcontrollers

Slave LIN Interface Controller (SLIC) Module
14.4 Interrupts
The SLIC module contains one interrupt vector, which can be triggered by sources encoded in the SLIC
state vector register. See 14.8.6 SLIC State Vector Register.
14.5 Modes of Operation
Figure 14-3 shows the modes in which the SLIC will operate.
V_DD <= V_DD (MIN)
(FROM ANY MODE)
ANY MCU RESET SOURCE
ASSERTED
POWER OFF
SLIC RESET
V_DD > V_DD (MIN) AND ANY
MCU RESET SOURCE ASSERTED
SLIC INIT
REQUESTED
(INITACK = 1)
NO MCU RESET SOURCE ASSERTED
INITREQ = 0; (INITACK = 0)
(FROM ANY MODE)
INITREQ SET TO 1 IN
SLCC1 REGISTER
SLCE CLEARED IN
SLCC2 REGISTER
NETWORK ACTIVITY
OR OTHER MCU
WAKEUP
SLIC DISABLED
SLIC RUN
SLCE SET IN SLCC2 REGISTER
NETWORK ACTIVITY OR OTHER
MCU WAKEUP
SLIC STOP
STOP INSTRUCTION
(WAIT INSTRUCTION
AND SLCWCM = 1)
(WAIT INSTRUCTION
AND SLCWCM = 0)
Figure 14-3. SLIC Operating Modes
SLIC WAIT
14.5.1 Power Off
This mode is entered from the reset mode whenever the SLIC module supply voltage V_DD drops below
its minimum specified value for the SLIC module to guarantee operation. The SLIC module will be placed
in the reset mode by a system low-voltage reset (LVR) before being powered down. In this mode, the pin
input and output specifications are not guaranteed.
14.5.2 Reset
This mode is entered from the power off mode whenever the SLIC module supply voltage V_DD rises above
its minimum specified value (V_DD(MIN)) and some MCU reset source is asserted. To prevent the SLIC from
entering an unknown state, the internal MCU reset is asserted while powering up the SLIC module. SLIC
reset mode is also entered from any other mode as soon as one of the MCU's possible reset sources (e.g.,
MC68HC908QL4 Data Sheet, Rev. 7
136
Freescale Semiconductor