Texas Instruments CC3235 SimpleLink Series - SPI_CHCONF Register Field Descriptions

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SWRU543–January 2019
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SPI (Serial Peripheral Interface)
Table 8-12. SPI_CHCONF Register Field Descriptions (continued)
Bit Field Type Reset Description
20 FORCE R/W 0h Manual SPIEN assertion to keep SPIEN active between SPI words
(single channel master mode only)
0h = Writing 0 into this bit drives low the SPIEN line when
SPI_CHCONF[EPOL] = 0, and drives it high when
SPI_CHCONF[EPOL] = 1.
1h = Writing 1 into this bit drives high the SPIEN line when
SPI_CHCONF[EPOL] = 0, and drives it low when
SPI_CHCONF[EPOL] = 1
19 TURBO R/W 0h
Turbo mode
0h = Turbo is deactivated (recommended for single SPI word
transfer)
1h = Turbo is activated to maximize the throughput for multi SPI
words transfer.
18 IS R/W 1h
Input select
0h = Data Line0 (SPIDAT[0]) selected for reception.
1h = Data Line1 (SPIDAT[1]) selected for reception
17 DPE1 R/W 1h
Transmission enable for data line 1
0h = Data Line1 (SPIDAT[1]) selected for transmission
1h = No transmission on data line 1 (SPIDAT[1])
16 DPE0 R/W 0h
Transmission enable for data line 0
0h = Data line 0 (SPIDAT[0]) selected for transmission
1h = No transmission on data line 0 (SPIDAT[0])
15 DMAR R/W 0h DMA read request.
The DMA read request line is asserted when the channel is enabled
and a new data is available in the receive register of the channel.
The DMA read request line is deasserted on read completion of the
receive register of the channel.
0h = DMA read request disabled
1h = DMA read request enabled
14 DMARW R/W 0h DMA write request.
The DMA write request line is asserted when The channel is enabled
and the transmitter register of the channel is empty.
The DMA write request line is deasserted on load completion of the
transmitter register of the channel.
0h = DMA write request disabled
1h = DMA write request enabled
13-12 TRM R/W 0h
Transmit receive modes
0h = Transmit and receive mode
11-7 WL R/W 0h
SPI word length
7h = The SPI word is 8-bits long
Fh = The SPI word is 16-bits long
1Fh = The SPI word is 32-bits long
6 EPOL R/W 0h
SPIEN polarity
0h = SPIEN is held high during the active state.
1h = SPIEN is held low during the active state.