Preliminary
Registers
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11.3.17 McBSP Pin Control Register (PCR_REG)
The McBSP_PCR_REG register is shown in
and described in
Figure 11-49. McBSP_PCR_REG
31
16
Reserved
R-0
15
14
13
12
11
10
9
8
Reserved
IDLE_EN
XIOEN
RIOEN
FSXM
FSRM
CLKXM
CLKRM
R-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
7
6
5
4
3
2
1
0
SCLKME
CLKS_STAT
DX_STAT
DR_STAT
FSXP
FSRP
CLKXP
CLKRP
R/W-0
R-0
R/W-0
R-0
R/W-0
R/W-0
R/W-0
R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 11-36. McBSP_PCR_REG Field Descriptions
Bit
Field
Value
Description
31-15
Reserved
0
Reserved.
14
IDLE_EN
Idle enable (legacy only).
This bit allows stopping all the clocks in the McBSP module. (legacy)
0
The McBSP is running
1
The clocks in the McBSP are shut off when both IDLE_EN=1 and his power domain is in idle mode
(Force idle or Smart idle)
13
XIOEN
Transmit General Purpose I/O Mode only when XRST=0 in SPCR[1,2]. (legacy only)
0
DX, FSX and CLKX are configured as serial port pins and do not function as general-purpose I/Os.
1
DX pin is a general purpose output. FSX and CLKX are general purpose I/Os. These serial port
pins do not perform serial port operation.
12
RIOEN
Receive General Purpose I/O Mode when RRST=0 in SPCR[1,2]. (legacy)
0
DR, FSR, CLKR and CLKS are configured as serial port pins and do not function as
general-purpose I/Os.
1
DR and CLKS pins are general purpose inputs; FSR and CLKR are general purpose I/Os. These
serial port pins do not perform serial port operation. The CLKS pin is affected by a combination of
RRST and RIOEN signals of the receiver.
11
FSXM
Transmit Frame-Synchronization Mode.
0
Frame-synchronization signal derived from an external source.
1
Frame synchronization is determined by the SRG frame-synchronization mode bit FSGM in
SRGR2.
10
FSRM
Receive Frame-Synchronization Mode.
0
Frame-Synchronization pulses generated by an external device. FSR is an input pin.
1
Frame synchronization generated internally by SRG. FSR is an output pin except when GSYNC=1
in SRGR.
9
CLKXM
Transmitter Clock Mode.
When digital loop-back mode set (McBSPi.McBSP_XCCR_REG[5] DLB=1), CLKXM bit is ignored.
The internal transmit clock (not the mcbspi_clkx pin) is driven by the internal SRG and mcbspi_clkx
pin is in high-impedance.
0
Transmitter clock is driven by an external clock with CLKX as an input pin.
1
CLKX is an output pin and is driven by the internal SRG.
1192
Multichannel Buffered Serial Port (McBSP)
SPRUGX9 – 15 April 2011
© 2011, Texas Instruments Incorporated
Содержание TMS320C6A816 Series
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