Silicon Laboratories SI2493/57/34/15/04 - Manual (Page 113)

AN93
Rev. 1.3 113
Table 73. U70 Bit Map
Bit Name Function
15 HES Enable Hardware Escape Pin.
0 = Disable.
1 = Enable.
14 Reserved Read returns zero.
13 TES Enable Escape (+++).
0 = Disable.
1 = Enable.
12 CIDM Caller ID Mask.
0 = Change in CID does not affect INT.
1 = CID low-to-high transition triggers INT.
11 OCDM Overcurrent Detect Mask.
0 = Change in OCD does not affect INT.
(“X” result code is not generated in command mode.)
1 = OCD low-to-high transition triggers INT.
(“X” result code is generated in command mode.)
10 PPDM Parallel Phone Detect Mask.
0 = Change in PPD does not affect INT.
1 = PPD low-to-high transition triggers INT.
9 RIM Ring Indicator Mask.
0 = Change in RI does not affect INT.
1 = RI low-to-high transition triggers INT.
8 DCDM Data Carrier Detect Mask.
0 = Change in DCD (U70, bit 0) does not affect INT.
1 = DCD high-to-low transition triggers INT.
7:5 Reserved Read returns zero.
4 CID Caller ID (sticky).
1 = Caller ID preamble detected; data to follow. Clears on :I read.
3 OCD Overcurrent Detect (sticky).
1 = Overcurrent condition has occurred. Clears on :I read.
2 PPD Parallel Phone Detect (sticky).
1 = Parallel phone detected since last off-hook event. Clears on :I read.
1 RI Ring Indicator (sticky).
1 = Ring event has occurred (ISOmodem on-hook). Clears on :I read.
0 DCD Data Carrier Detect (status).
1 = carrier detected (inverse of DCD pin).