33910 datasheet(34/90 Pages) FREESCALE

34 / 90 page

Analog Integrated Circuit Device Data

Freescale Semiconductor

33910

FUNCTIONAL DEVICE OPERATIONS

OPERATIONAL MODES

MC33910G5AC/MC3433910G5AC

Figure 17. High Side Drivers HS1 and HS2

Open Load Detection

Each high side driver signals an open load condition if the

current through the high side is below the open load current

threshold.

The open load condition is indicated with the bits HS1OP

and HS2OP in the High Side Status Register (HSSR).

Current Limitation

Each high side driver has an output current limitation. In

combination with the over-temperature shutdown the high-

side drivers are protected against over-current and short-

circuit failures.

When the driver operates in the current limitation area, it is

indicated with the bits HS1CL and HS2CL in the HSSR.

Note: If the driver is operating in current limitation mode,

excessive power might be dissipated.

Over-temperature Protection (HS Interrupt)

Both high side drivers are protected against over-

temperature. In case of an over-temperature condition both

high side drivers are shut down and the event is latched in the

Interrupt Control Module. The shutdown is indicated as HS

Interrupt in the Interrupt Source Register (ISR).

A thermal shutdown of the high side drivers is indicated by

setting all HSxOP and HSxCL bits simultaneously.

If the bit HSM is set in the Interrupt Mask Register (IMR),

then an interrupt (IRQ) is generated.

A write to the High Side Control Register (HSCR), when

the over-temperature condition is gone, will re-enable the

high side drivers.

High-voltage Shutdown

In case of a high voltage condition and if the high voltage

shutdown is enabled (bit HVSE in the Mode Control Register

(MCR) is set both high side drivers are shut down.

A write to the High Side Control Register (HSCR), when

the high voltage condition is gone, will re-enable the high side

drivers.

Sleep And Stop Mode

The high side drivers can be enabled to operate in Sleep

and Stop mode for cyclic sensing. Also see Table 6,

Operating Modes Overview.

LIN PHYSICAL LAYER

The LIN bus pin provides a physical layer for single-wire

communication in automotive applications. The LIN physical

layer is designed to meet the LIN physical layer specification

and has the following features:

• LIN physical layer 2.0, 2.1 and SAEJ2602 compliant

• Slew rate selection

• Over-temperature shutdown

• Advanced diagnostics

The LIN driver is a low side MOSFET with thermal

shutdown. An internal pull-up resistor with a serial diode

structure is integrated, so no external pull-up components are

High Side Driver

charge pump

open load detection

current limitation

over-temperture shutdown (interrupt maskable)

high voltage shutdown (maskable)

Control

on/off

Status

PWMIN

VDD

PWMHSx

HSx

HVSE

HSxOP

HSxCL

MOD1:2

Interrupt

Control

Module

HSx

VS2

VDD

Wakeup

Module

33910 Datasheet(PDF) 34 Page - Freescale Semiconductor, Inc

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