Регистры H616: SPI Normal DMA Mode Control Register

SPI_NDMA_MODE_CTL

9.3.5. SPI Normal DMA Mode Control Register - адрес: 0x5010088 0x5011088 (смещение: 0x0088)

Синхронный последовательный интерфейс: список регистров

31 |•|•|•|•|•|•|•|•|•|•|•|•|•|•|•|•| 16
15 |•|•|•|•|•|•|•|•|•|•|•|•|•|•|•|•| 00

Unused

Bits 31 : 8

DMA_ACTIVE

Bits 7 : 6
R/W
0x11

00:dma_active is low
01:dma_active is high
10:dma_active is controlled by dma_request(DRQ)
11:dma_active is controlled by controller

ACTIVE_FALL

Bit 5
R/W
0x1

0: active fall do not care ack
1: active fall must after detect ack is high

DELAY_CYCLES

Bits 4 : 0
R/W
0x05

Delay Cycles
The counts of hold cycles from DMA last signal high to dma_active high

Bit fields structure

typedef union spi_ndma_mode_ctl { struct { unsigned delay_cycles : 5; unsigned active_fall : 1; unsigned dma_active : 2; unsigned unused0 : 24; } b; unsigned long w; } SPI_NDMA_MODE_CTL