6 video port pin data output register (pdout) – Texas Instruments TMS320C64x DSP User Manual
Page 254
GPIO Registers
5-13
General Purpose I/O Operation
SPRU629
5.1.6
Video Port Pin Data Output Register (PDOUT)
The video port pin data output register (PDOUT) is shown in Figure 5–6 and
described in Table 5–7. The bits of PDOUT determine the value driven on the
corresponding GPIO pin, if the pin is configured as an output. Writes do not
affect pins not configured as GPIO outputs. The bits in PDOUT are set or
cleared by writing to this register directly. A read of PDOUT returns the value
of the register not the value at the pin (that might be configured as an input).
An alternative way to set bits in PDOUT is to write a 1 to the corresponding bit
of PDSET. An alternative way to clear bits in PDOUT is to write a 1 to the corre-
sponding bit of PDCLR.
PDOUT has these aliases:
-
PDSET — writing a 1 to a bit in PDSET sets the corresponding bit in
PDOUT to 1; writing a 0 has no effect and keeps the bits in PDOUT
unchanged.
-
PDCLR — writing a 1 to a bit in PDCLR clears the corresponding bit in
PDOUT to 0; writing a 0 has no effect and keeps the bits in PDOUT
unchanged.
Figure 5–6. Video Port Pin Data Output Register (PDOUT)
31
24
Reserved
R-0
23
22
21
20
19
18
17
16
Reserved
PDOUT22
PDOUT21
PDOUT20
PDOUT19
PDOUT18
PDOUT17
PDOUT16
R-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
15
14
13
12
11
10
9
8
PDOUT15
PDOUT14
PDOUT13
PDOUT12
PDOUT11
PDOUT10
PDOUT9
PDOUT8
R/W-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
PDOUT7
PDOUT6
PDOUT5
PDOUT4
PDOUT3
PDOUT2
PDOUT1
PDOUT0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
Legend: R = Read only; R/W = Read/Write; -n = value after reset