Texas Instruments TMS320C64x DSP Benutzerhandbuch
Video Port Control Registers
Video Port
2-20
SPRU629
2.7.2
Video Port Status Register (VPSTAT)
The video port status register (VPSTAT) indicates the current condition of the
video port. The VPSTAT is shown in Figure 2–4 and described in Table 2–7.
video port. The VPSTAT is shown in Figure 2–4 and described in Table 2–7.
Figure 2–4. Video Port Status Register (VPSTAT)
31
16
Reserved
R-0
15
4
3
2
1
0
Reserved
DCDIS
HIDATA
Reserved
R-0
R-x
R-x
R-0
Legend: R = Read only; -n = value after reset; -x = value is determined by chip-level configuration
Table 2–7. Video Port Status Register (VPSTAT) Field Descriptions
Bit
field
†
symval
†
Value
Description
31–4
Reserved
–
0
Reserved. The reserved bit location is always read as 0. A value
written to this field has no effect.
written to this field has no effect.
3
DCDIS
Dual-channel disable bit. The default value is determined by the
chip-level configuration.
chip-level configuration.
ENABLE
0
Dual-channel operation is enabled.
DISABLE
1
Port muxing selections prevent dual-channel operation.
2
HIDATA
High data bus half. HIDATA does not affect video port operation
but is provided to inform you which VDATA pins may be controlled
by the video port GPIO registers. HIDATA is never set unless
DCDIS is also set. The default value is determined by the
chip-level configuration.
but is provided to inform you which VDATA pins may be controlled
by the video port GPIO registers. HIDATA is never set unless
DCDIS is also set. The default value is determined by the
chip-level configuration.
NONE
0
USE
1
Indicates that another peripheral is using VDATA[9–0] and the
video port channel A (VDIN[9–0] or VDOUT[9–0]) is muxed onto
VDATA[19–10].
video port channel A (VDIN[9–0] or VDOUT[9–0]) is muxed onto
VDATA[19–10].
1–0
Reserved
–
0
Reserved. The reserved bit location is always read as 0. A value
written to this field has no effect.
written to this field has no effect.
† For CSL implementation, use the notation VP_VPSTAT_field_symval