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Freescale Semiconductor Electronic Components Datasheet

MC33912 Datasheet

LIN System Basis Chip

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MC33912 pdf
Freescale Semiconductor
Advance Information
Document Number: MC33912
Rev. 4.0, 2/2008
LIN System Basis Chip with DC
Motor Pre-driver and Current
Sense
33912
The 33912 is a Serial Peripheral Interface (SPI) -controlled System
Basis Chip (SBC), combining many frequently used functions in an
MCU-based system, plus a Local Interconnect Network (LIN)
transceiver. The 33912 has a 5.0V - 60mA low dropout regulator with
full protection and reporting features. The device provides full SPI-
readable diagnostics and a selectable timing watchdog for detecting
errant operation. The LIN Protocol Specification 2.0 compliant LIN
transceiver has waveshaping circuitry that can be disabled for higher
data rates.
www.DataSheet4UT.wcoom60mA high side switches and two 160mA low side switches
with output protection are available for driving resistive and inductive
loads. All outputs can be pulse-width modulated (PWM). Four high
voltage inputs are available for use in contact monitoring, or as external
wake-up inputs. These inputs can be used as high voltage Analog
Inputs. The voltage on these pins is divided by a selectable ratio and
available via an analog multiplexer.
The 33912 has three main operating modes: Normal (all functions
available), Sleep (VDD off, wake-up via LIN, wake-up inputs (L1-L4),
cyclic sense and forced wake-up), and Stop (VDD on with limited
current capability, wake-up via CS, LIN bus, wake-up inputs, cyclic
sense, forced wake-up and external reset).
The 33912 is compatible with LIN Protocol Specification 2.0.
SYSTEM BASIS CHIP WITH LIN
2ND GENERATION
AC SUFFIX (Pb-FREE)
98ASH70029A
32-PIN LQFP
ORDERING INFORMATION
Features
• Full-duplex SPI interface at frequencies up to 4MHz
Device
• LIN transceiver capable of up to 100kbps with wave shaping
• Two 60mA high side and two 160mA low side protected switches
• Four high voltage analog/logic Inputs
MC33912BAC/R2
MC34912BAC/R2
• Configurable window watchdog
• 5.0V low drop regulator with fault detection and low voltage reset (LVR) circuitry
• Current sense module
• Switched/protected 5.0V output (used for Hall sensors)
• Pb-free packaging designated by suffix code AC
VBAT
33912
VS1 VSENSE
VS2 HS1
Temperature
Range (TA)
-40°C to 125°C
-40°C to 85°C
Package
32-LQFP
LIN INTERFACE
LIN
L1
L2
L3
L4
VDD
MCU
PWMIN
ADOUT0
ADOUT1
MOSI
MISO
SCLK
CS
RXD
TXD
IRQ
RST
LS1
LS2
ISENSEH
ISENSEL
HVDD
HS2
WDCONF
M
Figure 1. 33912 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2007. All rights reserved.



Freescale Semiconductor Electronic Components Datasheet

MC33912 Datasheet

LIN System Basis Chip

No Preview Available !

MC33912 pdf
INTERNAL BLOCK DIAGRAM
RST IRQ
INTERNAL BLOCK DIAGRAM
VS2 VS1 VDD
INTERRUPT
CONTROL
MODULE
LVI, HVI, HTI, OCI
VOLTAGE REGULATOR
www.DataSheet4U.com
PWMIN
MISO
MOSI
SCLK
CS
ADOUT0
RESET CONTROL
MODULE
LVR, HVR, HTR, WD
WINDOW
WATCHDOG
MODULE
SPI
&
CONTROL
WAKE-UP MODULE
5V OUTPUT
MODULE
LOW SIDE
CONTROL
MODULE
HIGH SIDE
CONTROL
MODULE
VS2
VS2
VBAT
SENSE MODULE
CHIP TEMPERATURE
SENSE MODULE
ANALOG INPUT
MODULE
RXD
LIN PHYSICAL
TXD LAYER
DIGITAL INPUT MODULE
CURRENT SENSE MODULE
LGND
WDCONF
ADOUT1
AGND
HVDD
LS1
LS2
PGND
HS1
HS2
VSENSE
L1
L2
L3
L4
LIN
ISENSEH
ISENSEL
33912
2
Figure 2. 33912 Simplified Internal Block Diagram
Analog Integrated Circuit Device Data
Freescale Semiconductor



Freescale Semiconductor Electronic Components Datasheet

MC33912 Datasheet

LIN System Basis Chip

No Preview Available !

MC33912 pdf
PIN CONNECTIONS
PIN CONNECTIONS
www.DataSheet4U.com
RXD
TXD
MISO
MOSI
SCLK
CS
ADOUT0
PWMIN
1
2
3
4
5
6
7
8
24 HS2
23 L1
22 L2
21 L3
20 L4
19 LS1
18 PGND
17 LS2
Figure 3. 33912 Pin Connections
Table 1. 33912 Pin Definitions
A functional description of each pin can be found in the Functional Pin Description section beginning on page 21.
Pin
Pin Name
Formal Name
Definition
This pin is the receiver output of the LIN interface which reports the state of
1
RXD
Receiver Output
the bus voltage to the MCU interface.
This pin is the transmitter input of the LIN interface which controls the state of
2
TXD
Transmitter Input
the bus output.
SPI (Serial Peripheral Interface) data output. When CS is high, pin is in the
3
MISO
SPI Output
high-impedance state.
4 MOSI
SPI Input
SPI (Serial Peripheral Interface) data input.
5
SCLK
SPI Clock
SPI (Serial Peripheral Interface) clock Input.
6
CS
SPI Chip Select
SPI (Serial Peripheral Interface) chip select input pin. CS is active low.
7
ADOUT0
Analog Output Pin 0 Analog Multiplexer Output.
8
PWMIN
PWM Input
High Side and Low Side Pulse Width Modulation Input.
Bidirectional Reset I/O pin - driven low when any internal reset source is
9
RST
Internal Reset I/O asserted. RST is active low.
10
IRQ
Internal Interrupt
Output
Interrupt output pin, indicating wake-up events from Stop Mode or events from
Normal and Normal request modes. IRQ is active low.
11
ADOUT1
Analog Output Pin 1 Current sense analog output.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33912
3




Part Number MC33912
Description LIN System Basis Chip
Maker Freescale Semiconductor
Total Page 30 Pages
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