MC33910BAC / MC34910BAC
FUNCTIONAL DEVICE OPERATIONS
LOGIC COMMANDS AND REGISTERS
HSS - High Side Switch Status
REGISTER DEFINITIONS
This read-only bit indicates that one or more bits in the
HSSR are set.
System Status Register - SYSSR
The system status register (SYSSR) is always 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) and the HSSR.
1 = High Side Status bit set
0 = None
Table 38. System Status Register
HS1CL
HS1OP
HSS
S7
S6
S5
S4
HS2CL
Read
VMS
LINS
HSS
–.
HS2OP
VMS - Voltage Monitor Status
Figure 43. High Side Status
Mode Control Register - MCR
This read-only bit indicates that one or more bits in the
voltage status register (VSR) are set.
1 = Voltage Monitor bit set
0 = None
The MCR allows to switch between the operation modes
and to configure the 33910. Writing the MCR will return the
voltage status register (VSR).
Table 39. Mode Control Register - $0
BATFAIL
C3
C2
C1
C0
VDDOT
VMS
VSUV
VSOV
Write
HVSE
LINPE
MOD2
MOD1
Reset
Value
1
1
-
-
-
-
Figure 41. Voltage Monitor Status
Reset
Condition
POR
POR
LINS - LIN Status
This read-only bit indicates that one or more bits in the LIN
status register (LINSR) are set.
HVSE - High-voltage Shutdown Enable
This write-only bit enables/disables automatic shutdown of
the high side and the low side drivers during a high-voltage
VSOV condition.
1 = LIN Status bit set
0 = None
1 = automatic shutdown enabled
0 = automatic shutdown disabled
LINOC
LINPE - LIN pull-up enable.
LINOT
LINS
TXDOM
This write-only bit enables/disables the 30 kΩ LIN pull-up
resistor in Stop and Sleep modes. This bit also controls the
LIN bus wake-up threshold.
RXSHORT
1 = LIN pull-up resistor enabled
0 = LIN pull-up resistor disabled
Figure 42. LIN Status
33910
Analog Integrated Circuit Device Data
Freescale Semiconductor
79
FREESCALE [ Freescale ]
