Specifications

AN93
Rev. 0.9 91
Bit 13 (TES) = 1
b
(default) enables the traditional “+++”
escape sequence. To successfully escape from data
mode to command mode using “+++”, there must be no
UART activity for a guard period determined by register
S12, both before and after the “+++”. S12 can be set for
a period ranging from 200 ms to 5.1 seconds.
Bit 12 (CIDM) = 0
b
(default) prevents a change in
U70[4] (CID), caller ID, from triggering an interrupt. If
CIDM = 1
b
, an interrupt is triggered with a low-to-high
transition on CID.
Bit 11 (OCDM) = 0
b
(default), an interrupt is not
triggered with a change in OCD. If OCDM = 1
b
, a low-
to-high transition on U70[3] (OCD), overcurrent detect,
triggers an interrupt. This bit must be set for Australia
and Brazil.
Bit 10 (PPDM) = 1
b
(default) causes a low-to-high
transition in U70[2] (PPD), parallel phone detect, to
trigger an interrupt. If PPDM = 0
b
, an interrupt is not
triggered with a change in PPD.
Bit 9 (RIM) = 1
b
(default) causes a low-to-high transition
in U70[1] (RI), ring indicator, to trigger an interrupt. If
RIM = 0
b
, an interrupt is not triggered with a change in
RI.
Bit 8 (DCDM) = 1
b
(default) causes a high-to-low
transition in U70[0] (DCD), data carrier detect, to trigger
an interrupt. If DCDM = 0
b
, an interrupt is not triggered
with a change in DCD.
Bits 4:0 are the event indicators described below. All are
“sticky” (i.e., remain set to 1
b
after the event) and clear
on an interrupt read (AT:I).
Table 60. 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
.
9RIMRing Indicator Mask.
0 = Change in RI does not affect INT
.
1 = RI low-to-high transition triggers INT
.
8DCDMData 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.
4CIDCaller ID (sticky).
1 = Caller ID preamble detected; data to follow. Clears on :I read.