33910 datasheet(79/90 Pages) FREESCALE

79 / 90 page

Analog Integrated Circuit Device Data

Freescale Semiconductor

33910

FUNCTIONAL DEVICE OPERATIONS

LOGIC COMMANDS AND REGISTERS

MC33910BAC / MC34910BAC

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

VMS - Voltage Monitor Status

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

Figure 41. Voltage Monitor Status

LINS - LIN Status

This read-only bit indicates that one or more bits in the LIN

status register (LINSR) are set.

1 = LIN Status bit set

0 = None

Figure 42. LIN Status

HSS - High Side Switch Status

This read-only bit indicates that one or more bits in the

HSSR are set.

1 = High Side Status bit set

0 = None

Figure 43. High Side Status

Mode Control Register - MCR

The MCR allows to switch between the operation modes

and to configure the 33910. Writing the MCR will return the

voltage status register (VSR).

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 = automatic shutdown enabled

0 = automatic shutdown disabled

LINPE - LIN pull-up enable.

This write-only bit enables/disables the 30 k

Ω LIN pull-up

resistor in Stop and Sleep modes. This bit also controls the

LIN bus wake-up threshold.

1 = LIN pull-up resistor enabled

0 = LIN pull-up resistor disabled

Table 38. System Status Register

Read

VMS

LINS

HSS

–.

VMS

BATFAIL

VDDOT

VSUV

VSOV

LINS

LINOC

LINOT

TXDOM

RXSHORT

Table 39. Mode Control Register - $0

Write

HVSE

LINPE

MOD2

MOD1

Reset

Value

Reset

Condition

POR

HS2OP

HS2CL

HS1OP

HS1CL

HSS

33910 Datasheet(PDF) 79 Page - Freescale Semiconductor, Inc

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