McBSP3
9-13
DSP Public Peripherals
There are two modes for the McBSP3, which are selected by the bit 28,
MOD_MCBSP3_MODE_R, of the MOD_CONF_CTRL_0 register:
-
MOD_MCBSP3_MODE_R = 0 (default). In this case, the McBSP3 is half
duplex, master for transmission, slave for reception. The paths shown as
dashed lines in Figure 9–5 are not available in this mode. Table 9–11 lists
the McBSP3 signals available in this mode at the OMAP5910 level.
Table 9–11.
Available McBSP3 Signals in R = 0 Mode
Generic McBSP Signal Name
Description
McBSP3 Signal Name
FSX
Transmission frame (output only)
Not available
CLKX
Transmission clock (output only)
McBSP3.CLKX
DX
Transmit data (output only)
McBSP3.DX
FSR
Receive frame (input only)
Not available (internal
feedback from FSX)
CLKR
Receive clock (input only)
Not available (internal
feedback from FSX)
DR
Receive data
McBSP3.DR
-
MOD_MCBSP3_MODE_R = 1. In this case, the McBSP3 is half duplex,
master/slave for transmission, slave for reception. This mode utilizes the
paths shown as dashed lines in Figure 9–5. Table 9–12 lists the McBSP3
signals available in this mode at the OMAP5910 level.
Table 9–12. Available McBSP3 Signals in R = 1 Mode
Generic McBSP Signal Name
Description
McBSP3 Signal Name
FSX
Transmission frame (bidirectional)
McBSP3.FSX
(multiplexed on another
pad)
CLKX
Transmission clock (bidirectional)
McBSP3.CLKX
DX
Transmit data (output only)
McBSP3.DX
FSR
Receive frame (input only)
Not available (internal
feedback from FSX)
CLKR
Receive clock (input only)
Not available (internal
feedback from CLXX)
DR
Receive data
McBSP3.DR