Preliminary
Registers
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4.3.9 GPIO_CTRL Register
The GPIO_CTRL register controls the clock gating functionality. The DISABLEMODULE bit controls a
clock gating feature at the module level. When set, this bit forces the clock gating for all internal clock
paths. Module internal activity is suspended. System interface is not affected by this bit. System
interface clock gating is controlled with the AUTOIDLE bit in the system configuration register
(GPIO_SYSCONFIG). This bit is to be used for power saving when the module is not used because of
the multiplexing configuration selected at the chip level. This bit has precedence over all other internal
configuration bits. The GPIO_CTRL register is shown in
and described in
Figure 4-15. GPIO_CTRL Register
31
16
Reserved
R-0
15
3
2
1
0
Reserved
GATINGRATIO
DISABLEMODULE
R-0
R/W-1
R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 4-10. GPIO_CTRL Register Field Descriptions
Bit
Field
Value
Description
31-3
Reserved
0
Reserved
2-1
GATINGRATIO
Gating Ratio. Controls the clock gating for the event detection logic.
0
Functional clock is interface clock.
1h
Functional clock is interface clock divided by 2.
2h
Functional clock is interface clock divided by 4.
3h
Functional clock is interface clock divided by 8.
0
DISABLEMODULE
Module Disable
0
Module is enabled, clocks are not gated.
1
Module is disabled, clocks are gated.
4.3.10 GPIO_OE Register
The GPIO_OE register is used to enable the pins output capabilities. At reset, all the GPIO related pins
are configured as input and output capabilities are disabled. This register is not used within the module,
its only function is to carry the pads configuration. When the application is using a pin as an output and
does not want interrupt generation from this pin, the application can/has to configure properly the
Interrupt Enable registers. The GPIO_OE register is shown in
and described in
Figure 4-16. GPIO_OE Register
31
0
OUTPUTEN[n]
R/W-FFFF FFFFh
LEGEND: R/W = Read/Write; -n = value after reset
Table 4-11. GPIO_OE Register Field Descriptions
Bits
Field
Value
Description
31-0
OUTPUTEN[n]
Output Data Enable
0
The corresponding GPIO port is configured as an output.
1
The corresponding GPIO port is configured as an input.
544
General-Purpose I/O (GPIO) Interface
SPRUGX9 – 15 April 2011
© 2011, Texas Instruments Incorporated
Содержание TMS320C6A816 Series
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