mc33912 Freescale Semiconductor, Inc, mc33912 Datasheet - Page 36

• Manufacturer Part Number: mc33912
• Description: Lin System Basis Chip With Dc Motor Pre-driver And Current Sense
• Manufacturer: Freescale Semiconductor, Inc

REGISTER DEFINITIONS
System Status Register - SYSSR
transferred with every SPI transmission and gives a quick
system status overview. It summarizes the status of the
Voltage Status Register (VSR), LIN Status Register (LINSR),
High Side Status Register (HSSR), and the Low Side Status
Register (LSSR).
VMS - Voltage Monitor Status
VSR are set.
LINS - LIN Status
LINSR are set.
HSS - High Side Switch Status
HSSR are set.
36
33912
FUNCTIONAL DEVICE OPERATIONS
LOGIC COMMANDS AND REGISTERS
The System Status Register (SYSSR) is always
This read-only bit indicates that one or more bits in the
1 = Voltage Monitor bit set
0 = None
This read-only bit indicates that one or more bits in the
1 = LIN Status bit set
0 = None
This read-only bit indicates that one or more bits in the
1 = High Side Status bit set
0 = None
Table 8. System Status Register
Read
Figure 21. Voltage Monitor Status
BATFAIL
VDDOT
VSUV
VSOV
LINOC
LINOT
TXDOM
RXSHORT
VMS
Figure 22. LIN Status
S7
LINS
S6
HSS
VMS
LINS
S5
LSS
S4
LSS - Low Side Switch Status
LSSR are set.
Mode Control Register - MCR
between the operation modes and to configure the 33912.
Writing the MCR will return the VSR.
HVSE - High-Voltage Shutdown Enable
the high side and the low side drivers during a high-voltage
VSOV condition.
LINPE - LIN pull-up enable.
resistor in STOP and SLEEP Modes. This bit also controls
the LIN bus wake-up threshold.
This read-only bit indicates that one or more bits in the
1 = Low Side Status bit set
0 = None
The Mode Control Register (MCR) allows switching
This write-only bit enables/disables automatic shutdown of
1 = automatic shutdown enabled
0 = automatic shutdown disabled
This write-only bit enables/disables the 30
1 = LIN pull-up resistor enabled
0 = LIN pull-up resistor disabled
Table 9. Mode Control Register - $0
Condition
Reset
Value
Reset
Write
LS1CL
LS1OP
LS2CL
LS2OP
Figure 23. High Side Status
Figure 24. Low Side Status
HVSE
POR
C3
1
HS1CL
HS1OP
HS2CL
HS2OP
Analog Integrated Circuit Device Data
LINPE
POR
C2
1
Freescale Semiconductor
LSS
MOD2
C1
-
-
HSS
kΩ
MOD1
LIN pull-up
C0
-
-