SI3201-X-FS SILABS [Silicon Laboratories], SI3201-X-FS Datasheet - Page 32
SI3201-X-FS
Manufacturer Part Number
SI3201-X-FS
Description
Manufacturer
SILABS [Silicon Laboratories]
Datasheet
1.SI3201-X-FS.pdf
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Si3233
Linefeed Shadow register (direct Register 64). The data
then feeds into a programmable digital low pass filter,
which removes unwanted ac signal components before
threshold detection.
The output of the low pass filter is compared to a
programmable threshold, RPTP (indirect Register 16).
The threshold comparator output feeds a programmable
debouncing filter. The output of the debouncing filter
remains in its present state unless the input remains in
the opposite state for the entire period of time
programmed by the ring trip debounce interval,
RTDI[6:0] (direct Register 70). If the debounce interval
32
Ring Trip Interrupt Pending
Ring Trip Interrupt Enable
Ring Trip Detect Debounce Interval
Ring Trip Threshold
Ring Trip Filter Coefficient
Ring Trip Detect Status (monitor only)
Note: The ProSLIC uses registers that are both directly and indirectly mapped. A “direct” register is one that is mapped
LCS
directly. An “indirect” register is one that is accessed using the indirect access registers (direct registers 28 through
31).
Processor
Signal
Input
LFS
Parameter
ISP_OUT
Table 27. Associated Registers for Ring Trip Detection
Digital
NRTP
LPF
Figure 14. Ring Trip Detector
Threshold
Ring Trip
RPTP
Preliminary Rev. 0.5
+
–
has been satisfied, the RTP bit of direct Register 68 will
be set to indicate that a valid ring trip has occurred. A
ring trip interrupt is generated if enabled by the RTIE bit
(direct Register 22). Table 27 lists the registers that
must be written or monitored to correctly detect a ring
trip condition.
The recommended values for RPTP, NRTP, and RTDI
vary according to the programmed ringing frequency.
Register values for various ringing frequencies are
given in Table 28.
DBIRAW
NRTP[12:0]
RPTP[5:0]
RTDI[6:0]
Register
RTIP
RTIE
RTP
Debounce
Filter
RTDI
RTP
Indirect Register 16
Indirect Register 23
Direct Register 19
Direct Register 22
Direct Register 70
Direct Register 68
Location
Interrupt
Logic
RTIE
RTIP
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