3.4 GPIO Output Data Register (OUT_DATA n)
Registers
The GPIO output data register (OUT_DATA n) determines the value driven on the corresponding GPIO pin
n in GPIO bank I, if the pin is configured as an output (DIR n = 0). Writes do not affect pins not configured
as GPIO outputs. The bits in OUT_DATA n are set or cleared by writing directly to this register. A read of
OUT_DATA n returns the value of the register not the value at the pin (that might be configured as an
input). The GPIO output data register (OUT_DATA01) is shown in Figure 7 , OUT_DATA23 is shown in
Figure 8 , OUT_DATA4 is shown in Figure 9 , and described in Table 8 . See Table 1 to determine the
OUT_DATA n bit associated with each GPIO bank and pin number.
Figure 7. GPIO Banks 0 and 1 Output Data Register (OUT_DATA01)
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
OUT31 OUT30 OUT29 OUT28 OUT27 OUT26 OUT25 OUT24 OUT23 OUT22 OUT21 OUT20 OUT19 OUT18 OUT17 OUT16
R/W-0
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
OUT15 OUT14 OUT13 OUT12 OUT11 OUT10 OUT9 OUT8 OUT7 OUT6 OUT5 OUT4 OUT3 OUT2 OUT1 OUT0
R/W-0
LEGEND: R/W = Read/Write; - n = value after reset
Figure 8. GPIO Banks 2 and 3 Output Data Register (OUT_DATA23)
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
OUT63 OUT62 OUT61 OUT60 OUT59 OUT58 OUT57 OUT56 OUT55 OUT54 OUT53 OUT52 OUT51 OUT50 OUT49 OUT48
R/W-0
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
OUT47 OUT46 OUT45 OUT44 OUT43 OUT42 OUT41 OUT40 OUT39 OUT38 OUT37 OUT36 OUT35 OUT34 OUT33 OUT32
R/W-0
LEGEND: R/W = Read/Write; - n = value after reset
Figure 9. GPIO Bank 4 Output Data Register (OUT_DATA4)
31 16
Reserved
R-0
15 7 6 5 4 3 2 1 0
Reserved OUT70 OUT69 OUT68 OUT67 OUT66 OUT65 OUT64
R-0 R/W-0
LEGEND: R/W = Read/Write; R = Read only; - n = value after reset
Table 8. GPIO Output Data Register (OUT_DATA n) Field Descriptions
Bit Field Value Description
31-16 OUT n Output drive state of GPIO pin n. The OUT n bit is used to drive the output (low = 0, high = 1) of pin n on
GPIO bank 2 I + 1 only when pin n is configured as an output (DIR n = 0). The OUT n bit is ignored when
GPIO pin n is configured as an input. This bit field configures the GPIO pins on GPIO banks 1 and 3.
0 GPIO pin n is driven low.
1 GPIO pin n is driven high.
15-0 OUT n Output drive state of GPIO pin n. The OUT n bit is used to drive the output (low = 0, high = 1) of pin n on
GPIO bank 2 I only when pin n is configured as an output (DIR n = 0). The OUT n bit is ignored when GPIO
pin n is configured as an input. This bit field configures the GPIO pins on GPIO banks 0, 2, and 4.
0 GPIO pin n is driven low.
1 GPIO pin n is driven high.
20 General-Purpose Input/Output (GPIO) SPRUE25 – December 2005
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