The preferred MCU for charging pile human-computer interaction: LCD driver + graphics accelerator + rich peripherals

Single chip microcomputer STM32L151CCU6

Photocoupler

With the development of new energy vehicles, the charging pile market has also ushered in a big explosion. The charging pile products on the market are mainly divided into AC charging piles and DC charging piles. The AC charging pile has the following characteristics: small current, small pile, flexible installation, full charge, usually 6-8 hours, suitable for small passenger electric vehicles, mostly used in public parking lots, shopping malls and community garages. Home charging piles are also mostly AC charging piles. The DC charging pile is generally a large current, the charging amount is larger in a short time, the pile body is larger, and the occupied area is large. DC charging piles are suitable for fast DC charging of electric buses, CMB, hybrid buses, electric cars, taxis, and engineering vehicles.

Figure 1: Block diagram of the charging pile control part

As shown in the block diagram above, the RZ/A1 series is ideal for charging piles, mainly by the following features:

1) Built-in large memory

• Cortex-A9@400MHz CPU, 1000DMIPS

• On-chip RAM capacity 3MB~10MB

• High speed memory access

• Eliminates the need for external RAM, solves the problem of supply stability of external DRAM, and reduces system cost

2) Advanced graphics features

• Support high resolution (WXGA)

• Built-in high-speed 2D image accelerator for high-speed image processing (supports OpenVG1.1)

• Support multiple ways of video input / output

3) Advanced interactive functions

• 10/100M Ethernet MAC

• USB 2.0 supports Host/Function function

• SD/MMC interface, etc.

The Renesa RZ/A1 series MCUs from Shiqiang are integrated with rich analog and digital peripherals such as LCD driver, SRAM and graphics accelerator, and can realize the perfect combination of high-performance human-machine display. It is the human-computer interaction MCU of charging pile products. Second choice.

Figure 2: Comparison of performance parameters of RZ/A1 and other MCUs