Si2401
42
Preliminary Rev. 0.9
Reset settings = 0000_0000 (0x00)
S09 (INTS). Interrupt Status
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
CD
WOR
PPD
NVD
RI
CID
OCD
REV
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit
Name
Function
7
CD
Carrier Detect (sticky).
Active high bit indicates carrier detected (equivalent to inverse of CD pin). Clears on :1
read.
6
WOR
Wake-on-Ring (sticky).
Wake-on-ring has occurred. Clears on :I read.
5
PPD
Parallel Phone Detect (sticky).
Parallel phone detected since last off-hook event. Clears on :I read.
4
NVD
No Phone Line Detect (sticky).
No line phone detected. Clears on :I read.
3
RI
Ring Indicator (sticky).
Active high bit when the Si2403 is on-hook, indicates ring event has occurred. Clears on
:I read.
2
CID
Caller ID (sticky).
Caller ID preamble has been detected; data soon follows. Clears on :I read.
1
OCD
Overcurrent Detect (sticky).
Overcurrent condition has occurred. Clears on :I read.
0
REV
V.23 Reversal Detect (sticky).
V.23 reversal condition has occurred. Clears on :I read.
