CS5535-UDCF AMD (ADVANCED MICRO DEVICES), CS5535-UDCF Datasheet - Page 471

• Manufacturer Part Number: CS5535-UDCF
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of CS5535-UDCF

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

GPIO Subsystem Register Descriptions
6.16.3
The Geode CS5535 companion device has eight digital filter/event counter pairs (numbered 0 through 7) that can be
shared with 28 GPIOs. There are two 16-bit registers associated with digital filter (FILTER_AMOUNT and
FILTER_COUNTER) and two 16-bit registers associated with event counter (EVENTCOUNT and EVENT_COMP). The
Input Conditioning Function registers are not based on the atomic programming model.
6.16.3.1 GPIO Filter Amount (GPIO_FLTR[x]_AMNT)
GPIO_FILTER[x]_AMOUNT are 16-bit registers and programmed with a 16-bit filter count value.
GPIO Filter 0 Amount (GPIO_FLTR0_AMNT)
GPIO I/O Offset
Type
Reset Value
GPIO Filter 1 Amount (GPIO_FLTR1_AMNT)
GPIO I/O Offset
Type
Reset Value
GPIO Filter 2 Amount (GPIO_FLTR2_AMNT)
GPIO I/O Offset
Type
Reset Value
GPIO Filter 3 Amount (GPIO_FLTR3_AMNT)
GPIO I/O Offset
Type
Reset Value
AMD Geode™ CS5535 Companion Device Data Book
15
15:0
Bit
GPIO Input Conditioning Function Registers
14
Name
FILTER_AMOUNT
13
50h
R/W
0000h
58h
R/W
0000h
60h
R/W
0000h
68h
R/W
0000h
12
11
Description
Filter Amount. The associated GPIO input must remain stable for a FILTER_AMOUNT
number of 32 kHz clock edges in order for the output to change. A FILTER_AMOUNT of
0 effectively disables the filtering function because the counter will not roll over from 0
to all 1s. The maximum FILTER_AMOUNT is FFFFh.
GPIO_FLTR[x]_AMNT Bit Descriptions
GPIO_FLTR[x]_AMNT Register Map
10
9
FILTER_AMOUNT
8
GPIO Filter 4 Amount (GPIO_FLTR4_AMNT)
GPIO I/O Offset
Type
Reset Value
GPIO Filter 5 Amount (GPIO_FLTR5_AMNT)
GPIO I/O Offset
Type
Reset Value
GPIO Filter 6 Amount (GPIO_FLTR6_AMNT)
GPIO I/O Offset
Type
Reset Value
GPIO Filter 7 Amount (GPIO_FLTR7_AMNT)
GPIO I/O Offset
Type
Reset Value
7
6
5
70h
R/W
0000h
78h
R/W
0000h
D0h
R/W
0000h
D8h
R/W
0000h
4
31506B
3
2
1
0
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