S12 MagniV Mixed-Signal MCUs
S12ZVH MagniV Automotive
Instrument Cluster Reference
Solution
Overview
While low-end instrument cluster features
motor drivers, a 160-segment LCD display,
This reference design is not only provided as
haven’t changed much in the recent years,
a real-time counter with capabilities for hour,
a hardware reference but also as a software
the technology that drives these features
minute and second tracking and a speaker
and mechanical design. The software on
has advanced tremendously. The basic/
for tone and alert generation. The user
the reference design implements low-level
low-end line of instrument clusters relies on
interface design has buttons to modify the
drivers for several peripherals on the MCU
analog gauges, segment or dot matrix LCDs
display contents, activate/deactivate turn
(e.g., PWM, ADC, Timer, Real-Time Counter,
and tell-tales (LEDs) to inform the user of the
signals and modify the current time. It also
Simple Sound Generator, Motor Controller,
current status of their vehicle. The S12ZVH
has two potentiometers that control the
Stepper Stall Detection, LCD and more). The
automotive instrument cluster reference
backlight dimming and sound alerts volume
architecture of the application software uses
solution features all these functionalities on
respectively. For communications, the design
a scheduler to execute periodic tasks such
a production-looking design that leverages
has CAN communication provided by the
as controlling motor movement, LCD updates
on the impressive integration provided by the
on-chip CAN physical transceiver and LIN
and tell-tale illumination and animation. The
S12ZVH MagniV microcontroller.
provided by an off-chip physical transceiver.
mechanical elements of the reference solution
The power regulation on the design is done
are provided so that they can be replicated,
by the S12ZVH microcontroller itself thanks to
modified and reused freely.
The S12ZVH automotive instrument cluster
reference solution is aimed to be taken as
a design base for customers that wish to
the on-chip voltage regulator.
start an instrument cluster project. This
reference solution features four analog
gauges controlled by the on-chip stepper
S12ZVH128 Automotive Instrument Cluster Reference Solution
Automotive Cluster Reference
Design Key Features
Reference
Design
BoardBoard
Block Block
Diagram
Automotive
AutomotiveCluster
Cluster
Reference
Design
Diagram
• S12ZVH128 MCU with on-chip
32 KHz Osc
voltage regulator
• 160-segment LCD
• Four analog gauges (stepper motors)
• Piezoelectric speaker for alert
12 V
VREG
LIN
LINPHY
RTC
SCI
CAN
160-Segment
LCD Display
LCD
S12ZVH128
Backlight
BJTs
PWM
Temperature and
Potentiometers
ADC
CANPHY
SSG
generation
• RTC for accurate time keeping
MC SSD
BJTs
Passive
Amplification
• CAN (on-chip PHY)
Speaker
• LIN with off-chip PHY
Buttons
GPIOs
Stepper
Motors
Tell-Tales
• Twelve tell-tales
• Dimmable background
S12ZVH MCU Key Features
• S12Z improved performance 16-bit core
• 128 KB of flash with ECC
• 4 KB of EEPROM with ECC
• 8 KB of RAM with ECC
• Up to 18 V voltage regulator
(up to 40 for limited periods)
Freescale Technology
MagniV
Mixed-Signal
S12ZVH:
S12ZVH S12
Family
Block
Diagram MCU Block Diagram
Voltage Regulator
5 V Outputs with
External Ballast
CAN
PHY
CAN
2.0 A/B
Up to 128 KB Flash (ECC)
Up to 4 KB EEPROM (ECC)
Segment LCD
(Up to 4x40)
Up to
Four Stepper Motors
with Stall Detection
2 x SCI
SPI
Up to 8 KB RAM (ECC)
• CAN physical transceiver
• –40 °C to 105 °C
• 100 LQFP and 144 LQFP
package options
I2C
ADC
10-bit, 8-ch.
RTC
S12Z CPU
144-pin LQFP
100-pin LQFP
Simple
Sound Generator
PWM 8-bit,
8-ch./16-bit, 4-ch.
2x Timer
16-bit x 8-ch.
GPIO
Up to 104
Internal Oscillator,
1 MHz
For more information, visit freescale.com/S12ZVH.
Freescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. MagniV is a
trademark of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners.
© 2013 Freescale Semiconductor, Inc.
Document Number: S12ZVHREFV1 REV 0