DX
Internal FSX
W0
W1
W2
W3
XRDY
DXR to XSR
copy (W0)
Write of DXR
(W1)
Write of DXR
(W2)
DXR to XSR
copy (W1)
Write of DXR
(W3)
DXR to XSR
copy (W2)
DXR to XSR
copy (W3)
mcbsp-044
DX
Internal FSX
W1
W3
XRDY
DXR to XSR
copy (W1)
Write of DXR
(W3)
DXR to XSR
copy (W3)
mcbsp-045
DX
Internal FSX
W1
W3
XRDY
DXR to XSR
copy (W0)
Write of DXR
(W1)
Write of DXR
(W2)
DXR to XSR
copy (W1)
Write of DXR
(W3)
DXR to XSR
copy (W2)
DXR to XSR
copy (W3)
mcbsp-046
Public Version
www.ti.com
McBSP Functional Description
Figure 21-49. Activity on McBSP Pins When XMCM=0b00
If XMCM = 0b00, all channels are enabled and unmasked. Words W0, W1, W2, and W3 are written to the
XB, then, from the XB, there are transferred by mcbspi_dx.
Figure 21-50. Activity on McBSP Pins When XMCM=0b01
In
if XMCM = 0b01, XPABLK = 0b00, and XCERA = 0b1010, only channels 1 and 3 are
enabled and unmasked. Words W1 and W3 are written to the XB, then, from the XB, there are transferred
by mcbspi_dx.
Figure 21-51. Activity on McBSP Pins When XMCM=0b10
In
if XMCM = 0b10, XPABLK = 0b00, and XCERA = 0b1010, all channels are enabled, only
1 and 3 unmasked. Words W0, W1, W2, and W3 are written to the XB, but only W1 and W3, from the XB,
there are transferred by mcbspi_dx.
3119
SWPU177N – December 2009 – Revised November 2010
Multi-Channel Buffered Serial Port
Copyright © 2009–2010, Texas Instruments Incorporated