MAX32600 User’s Guide
Communication Peripherals
7.2 SPI
Defines number of used FIFO entries (bytes) required to assert Almost Full flag. FIFO depth is 32 bytes.
SPIn_FIFO_CTRL.rx_fifo_used
Field
Bits
Default
Access
Description
rx_fifo_used
29:24
n/a
R/O
Results FIFO Used
Returns number of currently used byte entries in the Results FIFO
7.2.9.1.5
SPIn_SPCL_CTRL
SPIn_SPCL_CTRL.ss_sample_mode
Field
Bits
Default
Access
Description
ss_sample_mode
0
0
R/W
SS Sample Mode
Enables (when set to 1) the ability to drive SDIO outputs prior to the assertion of Slave Select. This bit should be set when the SPI bus is idle and the transaction
FIFO is empty; it will auto- clear when the next slave select assertion occurs.
SPIn_SPCL_CTRL.miso_fc_en
Field
Bits
Default
Access
Description
miso_fc_en
1
0
R/W
SDIO(1) to SR(0) Mode
When set to 1, routes SDIO(1) input to SR0 for use with devices that use MISO for flow control during writes. Must be cleared to perform reads.
SPIn_SPCL_CTRL.ss_sa_sdio_out
Field
Bits
Default
Access
Description
ss_sa_sdio_out
7:4
0000b
R/W
SDIO Active Output Value
Rev.1.3 April 2015
Maxim Integrated
Page 278
Содержание MAX32600
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