33910 datasheet(39/90 Pages) FREESCALE

39 / 90 page

Analog Integrated Circuit Device Data

Freescale Semiconductor

33910

FUNCTIONAL DEVICE OPERATIONS

LOGIC COMMANDS AND REGISTERS

MC33910G5AC/MC3433910G5AC

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 Monitor Status (VMS), LIN Status (LINS) and High

Side Status (HSS).

VMS - Voltage Monitor Status

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

VSR are set.

1 = Voltage Monitor bit set

0 = None

Figure 20. Voltage Monitor Status

LINS - LIN Status

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

LINSR are set.

1 = LIN Status bit set

0 = None

Figure 21. 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 22. High Side Status

Mode Control Register - MCR

The Mode Control Register (MCR) allows switching

between the operation modes and to configure the 33910.

Writing the MCR will return the VSR.

HVSE - High-Voltage Shutdown Enable

This write-only bit enables/disables automatic shutdown of

the high side drivers during a high-voltage VSOV condition.

1 = automatic shutdown enabled

0 = automatic shutdown disabled

MOD2, MOD1 - Mode Control Bits

These write-only bits select the operating mode and allow

clearing the watchdog in accordance with Table 8, Mode

Control Bits.

Table 12. Mode Control Bits

Voltage Status Register - VSR

Returns the status of the several voltage monitors. This

Table 10. System Status Register

Read

VMS

LINS

HSS

VMS

BATFAIL

VDDOT

VSUV

VSOV

LINS

LINOT

TXDOM

RXSHORT

Table 11. Mode Control Register - $0

Write

HVSE

MOD2

MOD1

Reset

Value

Reset

Condition

POR

MOD2

MOD1

Description

Normal Mode

Stop Mode

Sleep Mode

Normal Mode + Watchdog Clear

Table 13. Voltage Status Register - $0/$1

Read

VSOV

VSUV

VDDOT

BATFAIL

HS2OP

HS2CL

HS1OP

HS1CL

HSS

33910 Datasheet(PDF) 39 Page - Freescale Semiconductor, Inc

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