PRELIMINARY
PCT1789W DATA SHEET
PCT303DW CONTROL REGISTERS
!!
Control 4
(Register 4, R)
Reserved
7
6
5
4
3
2
1
0
Reset settings: 00h
Bit Definitions:
Bits
Name
Reserved
Description
7:0
Reserved. Read returns zero.
DAA Control 1
(Register 5, R/W)
Reserved
RDTN
RDTP
OPOL
ONHM
RDT
OHE
OH
7
6
5
4
3
2
1
0
Reset settings: 00h
Bit Definitions:
Bits
Name
Description
7
6
5
4
Reserved
RDTN
RDTP
Reserved. Read returns zero.
Ring detect signal negative. Read-only. When set, a negative ring signal is occurring.
Ring detect signal positive. Read-only. When set, a positive ring signal is occurring.
OPOL
Off-hook polarity.
1 = Off-hook pin is active-high.
0 = Off-hook pin is active-low.
3
2
ONHM
RDT
On-hook line monitor. 1 = Enables low-power monitoring mode allowing the DSP to
receive line activity without going off-hook.
Ring detect. Read-only.
1 = Indicates a ring is occurring.
0 = Reset either 4.5–9 seconds after last positive ring is detected or when the system
executes an off-hook.
1
0
OHE
OH
Off-hook pin enable.
1 = Enables the operation of the off-hook pin.
0 = Off-hook pin is ignored.
Off-hook. 1 = Causes the line-side chip to go off-hook. This bit operates indepen-
dently of OHE and is a logic OR with the off-hook pin when enabled.
PRELIMINARY
PC-TEL, Inc.
42
1789W0DOCDAT06A-0299
ETC [ ETC ]
