cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 456

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

www.national.com
GPIO Subsystem Register Descriptions
5.16.3.3
Writing to these 16-bit registers programs the counter value. Reads provide current counter value.
GPIO Event Counter 0 (GPIO_EVNTCNT0)
GPIO I/O Offset
Type
Reset Value
GPIO Event Counter 1 (GPIO_EVNTCNT1)
GPIO I/O Offset
Type
Reset Value
GPIO Event Counter 2 (GPIO_EVNTCNT2)
GPIO I/O Offset
Type
Reset Value
GPIO Event Counter 3 (GPIO_EVNTCNT3)
GPIO I/O Offset
Type
Reset Value
15
15:0
Bit
14
GPIO Event Counter (GPIO_EVNTCNT[x])
Name
EVENT_COUNT
13
54h
R/W
0000h
5Ch
R/W
0000h
64h
R/W
0000h
6Ch
R/W
0000h
12
11
Description
Event Counter Status. Direct access to the counter’s state is provided via this register
and may be read at any time to determine the current value of the counter. This register
may also be written to at any time, thereby jamming the counter state forward or back-
ward from the current count. Hardware provisions exist to ensure accurate readings
even if a counter edge is in process.
GPIO_EVNTCNT_[x] Bit Descriptions
10
GPIO_EVNTCNT[x] Register Map
9
EVENT_COUNT
8
(Continued)
456
GPIO Event Counter 4 (GPIO_EVNTCNT4)
GPIO I/O Offset
Type
Reset Value
GPIO Event Counter 5 (GPIO_EVNTCNT5)
GPIO I/O Offset
Type
Reset Value
GPIO Event Counter 6 (GPIO_EVNTCNT6)
GPIO I/O Offset
Type
Reset Value
GPIO Event Counter 7 (GPIO_EVNTCNT7)
GPIO I/O Offset
Type
Reset Value
7
6
5
74h
R/W
0000h
7Ch
R/W
0000h
D4h
R/W
0000h
DCh
R/W
0000h
4
3
2
1
Revision 0.8
0