cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 445

• Manufacturer Part Number: cs5535
• Description: Geode Cs5535 Companion Multi-function South Bridge
• Manufacturer: National Semiconductor Corporation

Revision 0.8
GPIO Subsystem Register Descriptions
5.16.2.12 GPIO Input Event Count Enable (GPIO[x]_IN_EVNTCNT_EN)
These registers control the enabling of the input event counter function for the low (GPIO[15:0]) and high (GPIO[31:16])
banks of GPIOs. If the feature bit is high, the event counter function is enabled on the input. If the feature bit is low, the
event counter function is disabled on the input. The reset value forces all the filter functions to be disabled. (These registers
use atomic programming, see Section 5.16.1 on page 436 for details.)
When the event counter is enabled, the filter must also be enabled (GPIO I/O Offset 28h/A8h). If no filtering is desired, then
program the GPIO_FILTER[x]_AMOUNT register to 0.
GPIO Low Bank Input Event Count Enable
(GPIOL_IN_EVNTCNT_EN)
GPIO I/O Offset
Type
Reset Value
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
2Ch
R/W
FFFF0000h
GPIOH_IN_EVNTCNT_EN Register Map
GPIOL_IN_EVNTCNT_EN Register Map
(Continued)
445
GPIO High Bank Input Event Count Enable
(GPIOH_IN_EVNTCNT_EN)
GPIO I/O Offset
Type
Reset Value
ACh
R/W
FFFF0000h
9
9
8
8
7
7
6
6
5
5
4
4
3
3
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