SI2401 Datasheet, PDF (57/74 Pages) List of Unclassifed Manufacturers – V.22BIS ISOMODEM WITH INTEGRATED GLOBAL DAA

Si2401
SEC (RVC1). Ring Validation Control 1
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name RNGV
RDLY[2:0]
RCC[2:0]
Type R/W
R/W
R/W
Reset settings = 1000_1000 (0x88)
Bit
Name
Function
7
RNGV
Ring Validation Enable.
0 = Ring validation feature is disabled.
1 = Ring validation feature is enabled in both normal operating mode and low-
power mode.
6:4 RDLY[2:0] Ring Delay.
These bits set the amount of time between when a ring signal is validated and when a
valid ring signal is indicated.
RDLY[2:0]
Delay
000
0 ms
001
256 ms
010
512 ms
.
.
.
111
1792 ms
3:1
RCC[2:0] Ring Confirmation Count.
These bits set the amount of time that the ring frequency must be within the tolerances
set by the RAS[5:0] bits and the RMX[3:0] bits to be classified as a valid ring signal.
RCC[2:0]
Ring Confirmation Count Time
000
100 ms
001
150 ms
010
200 ms
011
256 ms
100
384 ms
101
512 ms
110
640 ms
111
1024 ms
0
Reserved This bit must always be written to zero.
Preliminary Rev. 0.9
57