Video Port/VCXO Interpolated Control (VIC) Port User's Guide

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5.1.8 Video Port Pin Data Clear Register (PDCLR)
GPIO Registers
PDCLR is an alias of the video port pin data output register (PDOUT) for writes only and provides an
alternate means of driving GPIO outputs low. Writing a 1 to a bit of PDCLR clears the corresponding bit in
PDOUT. Writing a 0 has no effect. Register reads return all 0s.
The video port pin data clear register (PDCLR) is shown in Figure 5-8 and described in Table 5-9 .
Figure 5-8. Video Port Pin Data Clear Register (PDCLR)
31 24
Reserved
R-0
23 22 21 20 19 18 17 16
Reserved PDCLR22 PDCLR21 PDCLR20 PDCLR19 PDCLR18 PDCLR17 PDCLR16
R-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0
15 14 13 12 11 10 9 8
PDCLR15 PDCLR14 PDCLR13 PDCLR12 Reserved Reserved PDCLR9 PDCLR8
W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0
7 6 5 4 3 2 1 0
PDCLR7 PDCLR6 PDCLR5 PDCLR4 PDCLR3 PDCLR2 Reserved Reserved
W-0 W-0 W-0 W-0 W-0 W-0 R-0 R-0
LEGEND: R/W = Read/Write; R = Read only; - n = value after reset
Table 5-9. Video Port Pin Data Clear Register (PDCLR) Field Descriptions
Bit field
(1)
symval
(1)
Value Description
31-23 Reserved - 0 Reserved. The reserved bit location is always read as 0. A value written to this field
has no effect.
22 PDCLR22 OF( value) Allows PDOUT22 bit to be cleared to a logic low without affecting other I/O pins
controlled by the same port.
DEFAULT 0 No effect.
NONE
VCTL3CLR 1 Clears PDOUT22 (VCTL3) bit to 0.
21 PDCLR21 OF( value) Allows PDOUT21 bit to be cleared to a logic low without affecting other I/O pins
controlled by the same port.
DEFAULT 0 No effect.
NONE
VCTL2CLR 1 Clears PDOUT21 (VCTL2) bit to 0.
20 PDCLR20 OF( value) Allows PDOUT20 bit to be cleared to a logic low without affecting other I/O pins
controlled by the same port.
DEFAULT 0 No effect.
NONE
VCTL1CLR 1 Clears PDOUT20 (VCTL1) bit to 0.
19-2 PDCLR[19-2] OF( value) Allows PDOUT[19-2] bit to be cleared to a logic low without affecting other I/O pins
controlled by the same port.
DEFAULT 0 No effect.
NONE
VDATA nCLR 1 Clears PDOUT[ n] (VDATA[ n]) bit to 0.
(1)
For CSL implementation, use the notation VP_PDCLR_PDCLR n_ symval
General-Purpose I/O Operation162 SPRUEM1 – May 2007
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