SN32F280 Series
32-Bit Cortex-M0 Micro-Controller
SONiX TECHNOLOGY CO., LTD
Page 161
Version 1.1
13.6.9 SPI n Data Fetch register (SPIn_DF) (n=0,1)
Address Offset: 0x20
Bit
Name
Description
Attribute
Reset
31:1
Reserved
R
0
0
DF
SPI data fetch control bit
0: Disable
1: Enable when SCKn frequency > 6MHz
R/W
0
13.6.10 SPI n DMA Control register (SPIn_DMACTRL) (n=0)
Address Offset: 0x24
SPIn DMA (Direct memory access) is only used in order to provide high-speed data transfer between external SPI-flash
and TFT-LCD. Data can be moved from SPI FIFOs to TFT-LCD by DMA without any CPU actions. This keeps CPU
resources free for other operations. The data length of SPIn DMA is 8 bits. Please refer to Section
Bit
Name
Description
Attribute
Reset
31:1
Reserved
R
0
1
DIR
SPI data transfer direction
0: SPI1_DATA(RX) to SPI0_DATA(TX), when
DMATCIE
and
DMAHTIE
enable, and trigger SPI0 interrupt
1: SPI0_DATA(RX) to SPI1_DATA(TX) , when
DMATCIE
and
DMAHTIE
enable, and trigger SPI1 interrupt
R/W
0
0
DMAEN
SPI to SPI DMA enable bit
0: Disable (cleared by HW)
1: Enable
R/W
0
13.6.11 SPI n DMA Number of Data Transfer register (SPIn_DMACNT) (n=0)
Address Offset: 0x28
Bit
Name
Description
Attribute
Reset
31:28
Reserved
R
0
27:0
CNT[27:0]
Number of data to DMA RX count transfer (0 up 0xFFFFFFF)
This register can only be written when the DMA is disabled. Once
the DMA is enabled, this register is read-only, indicating the
remaining bytes to be transmitted.
Once the transfer is completed(CURCNT=CNT), and trigger
DMATC interrupt.
R/W
0
13.6.12 SPI n DMA Number of Half Data Transfer register (SPIn_DMAHTCNT)
(n=0)
Address Offset: 0x2C
Bit
Name
Description
Attribute
Reset
31:28
Reserved
R
0
Содержание SN32F280 Series
Страница 222: ...SN32F280 Series 32 Bit Cortex M0 Micro Controller SONiX TECHNOLOGY CO LTD Page 222 Version 1 1 A1D16...
Страница 263: ...SN32F280 Series 32 Bit Cortex M0 Micro Controller SONiX TECHNOLOGY CO LTD Page 263 Version 1 1 26 2 LQFP 64 PIN...
Страница 264: ...SN32F280 Series 32 Bit Cortex M0 Micro Controller SONiX TECHNOLOGY CO LTD Page 264 Version 1 1 26 3 LQFP 48 PIN...