SI3232 SILABS [Silicon Laboratories], SI3232 Datasheet - Page 36

• Manufacturer Part Number: SI3232
• Description: DUAL PROGRAMMABLE CMOS SLIC WITH LINE MONITORING
• Manufacturer: SILABS [Silicon Laboratories]

Si3232
36
Ground Key Interrupt Pend-
ing
Ground Key Interrupt Enable
Linefeed Shadow
Ground Key Detect Status
Ground Key Detect
Debounce Interval
Longitudinal Current Sense
Ground Key Threshold (high)
Ground Key Threshold (low)
Ground Key Filter Coefficient
Note: The usable range for LONGHITH and LONGLOTH is limited to 16 mA. Setting a value >16 mA will disable threshold
detection
Parameter
Table 22. Register and RAM Locations used for Ground Key Detection
LONGLOTH
LONGHITH
Mnemonic
LINEFEED
LONGLPF
LONGDBI
IRQVEC2
Register/
LCRRTP
IRQEN2
ILONG
RAM
Preliminary Rev. 0.96
LONGHITH[15:0]
LONGLPF[15:3]
LONGDBI[15:0]
Register/RAM
GLOTH[15:0]
ILONG[15:0]
LONGHI
LFS[2:0]
LONGS
LONGE
LON-
Bits
Programmable
0 to 101.09 mA
0 to 101.09 mA
Monitor only
Monitor only
Monitor only
0 to 40.96 s
0 to 4000h
Yes/No
Yes/No
Range
*
*
LSB Size
3.097 µA
3.097 µA
1.25 ms
N/A
N/A
N/A
N/A
N/A
Resolutio
396.4 µA
396.4 µA
Table 14
1.25 ms
See
N/A
N/A
N/A
N/A
N/A
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