Texas Instruments AM335 Series Technical Reference Manual

Device
spim_cs0
spim_somi
spim_simo
spim_clk
SIMO
SIMO
SIMO
SIMO
SCLK
SCLK
SCLK
SCLK
SOMI
SOMI
SOMI
SOMI
CS
CS
CS
CS
Generic
SPImaster
device
Generic
SPIslave
device
Generic
SPIslave
device
Generic
SPIslave
device
108-017
McSPI
modulem
www.ti.com Functional Description
Figure 24-23. Example of SPI Slave with One Master and Multiple Slave Devices on Channel 0
24.3.3.2 Interrupt Events in Slave Mode
The interrupt events related to the transmitter register state are TX_empty and TX_underflow. The
interrupt events related to the receiver register state are RX_full and RX_overflow.
24.3.3.2.1 TX_EMPTY
The event TX_empty is activated when the channel is enabled and its transmitter register becomes empty.
Enabling channel automatically raises this event. When FIFO buffer is enabled
(MCSPI_CH(I)CONF[FFEW] set to 1), the TX_empty is asserted as soon as there is enough space in
buffer to write a number of byte defined by MCSPI_XFERLEVEL[AEL].
Transmitter register must be load to remove source of interrupt and TX_empty interrupt status bit must be
cleared for interrupt line de-assertion (if event enable as interrupt source).
When FIFO is enabled, no new TX_empty event will be asserted unless the host performs the number of
writes to the transmitter register defined by MCSPI_XFERLEVEL[AEL]. It is the responsibility of the Local
Host to perform the right number of writes.
4023
SPRUH73H–October 2011–Revised April 2013 Multichannel Serial Port Interface (McSPI)
Submit Documentation Feedback
Copyright © 2011–2013, Texas Instruments Incorporated

Texas Instruments AM335 Series Specifications

General

Brand	Texas Instruments
Model	AM335 Series
Category	Computer Hardware
Language	English