908E626_09 Datasheet, PDF (18/44 Pages) Freescale Semiconductor, Inc – Integrated Stepper Motor Driver with Embedded MCU and LIN Serial Communication

FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
MCU Die
From Reset
Initialize
Analog Die
Operate
SPI:
GS =1
(MREG off)
STOP
IRQ
Interrupt?
SPI: Reason for
Interrupt
Operate
STOP MREG
Wait for Action
LIN
AWD
Hallport
Assert IRQ_A
Start
MREG
MREG = Main Voltage
Regulator
Figure 8. STOP Mode / Wake-up Procedure
INTERRUPT FLAG REGISTER (IFR)
Register Name and Address: IFR - $05
Bit7 6
5
4
3
2
1 Bit0
Read
0
Write
OCF
0
0
LINF HTF LVF HVF
Reset 0
0
0
0
0
0
0
0
LINF — LIN FLAG BIT
This read / write flag is set on the falling edge at the LIN
data line. Clear LINF by writing a logic [1] to LINF. Reset
clears the LINF bit. Writing a logic [0] to LINF has no effect.
• 1 = Falling edge on LIN data line has occurred.
• 0 = Falling edge on LIN data line has not occurred since
last clear.
HTF — HIGH TEMPERATURE FLAG BIT
This read / write flag is set on a high temperature condition.
Clear HTF by writing a logic [1] to HTF. If a high temperature
condition is still present while writing a logic [1] to HTF, the
908E626
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Analog Integrated Circuit Device Data
Freescale Semiconductor