TMS470PLF221RFPQ1 is TI's ARM7-based MCU, which is specially developed for the development of automotive dashboards. It has 6 stepper motor drivers, which can subdivide the control of six instrument motors at the same time. HET, which can generate very precise timing, cooperate with DMA and multi-buffer serial SPI, can complete the external function design, and takes up very little resources. In addition, the chip has built-in CAN and LIN controller, which is very suitable for car. Development of dashboards. Lerda has developed a high-end automotive dashboard solution based on the TMS470PLF221RFPQ1 with TFT LCD.

Scheme picture:

Automotive Dashboard Development Solution Based on TMS470PLF221RFPQ1

Scheme block diagram:

Automotive Dashboard Development Solution Based on TMS470PLF221RFPQ1

1, the basic requirements of the program specifications:

• Working voltage: VCC 1.8~2.5V

VIO 4.5~6V

• Main frequency: 48MHZ ARM7

• ARM7 core, 16/32 bit RISC command system

• Flash: 256KB RAM: 16KB

• JTAG encryption module JSM included

• 1 channel up to 1Mbps multi-buffered parallel interface, 1 channel SPI interface, 2 channel I2C interface

• Built-in 1 way standard CAN and high speed CAN bus interface, 1 channel LIN bus interface

• Built-in support for up to 6 stepper motor drives

• 22 high-end timers HET1 and 24-channel HET2

• Built-in 16 10-bit ADC1 and 6 10-bit ADC2

• Up to 105 I/O ports

• Operating temperature: -40 ° C ~ 125 ° C

• Package: LQFP144

2. LCD display part:

The key part of this solution is the LCD screen driver. The TMS470PLF221RFPQ1 has an LCDA module inside:

Automotive Dashboard Development Solution Based on TMS470PLF221RFPQ1

External features:

A, Power Supply part design

B, instrument stepper motor design principle (software and Hardware part)

C, CAN / LIN bus circuit design principle (software and hardware)

More exciting, please refer to the TFT screen dashboard design

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