STM32 - L4系列芯片手册: 总线架构

术语：

 

• AHB: advanced high-performance bus.

• APB: advanced peripheral bus.

STM32L4芯片主系统包含了32位的多层AHB互联的总线矩阵模型。

包含多达9个总线主控制器：

– Cortex® -M4 with FPU core I-bus

– Cortex® -M4 with FPU core D-bus

– Cortex® -M4 with FPU core S-bus

– DMA1

– DMA2

– DMA2D (Chrom-Art Accelerator™) memory bus

– LCD-TFT controller DMA-bus

– SDMMC1 bus

– GFXMMU (Chrom-GRC™) bus  (only for STM32L4Sxxx and STM32L4R5xxx devices)

多达11个从设备：

– Internal Flash memory on the I-Code bus

– Internal Flash memory on D-Code bus

– Internal SRAM1

(192 Kbytes for STM32L4Rxxx and STM32Sxxx devices and

128 Kbytes for STM32L4P5xx and STM32Q5xx devices)

– Internal SRAM2 (64 Kbytes)

– Internal SRAM3

(384 Kbytes for STM32L4Rxxx and STM32L4Sxxx devices and