PC-TEL, Inc.
44
1789N0DOCDAT01A-0399
PCT1789N DATA SHEET
303DL C
ONTROL
R
EGISTERS
!
PRELIMINARY
PRELIMINARY
Control 3
(Register 3, R)
Reset settings: 00h
Bit Definitions:
Control 4
(Register 4, R)
Reset settings: 00h
Bit Definitions:
DAA Control 1
(Register 5, R/W)
Reset settings: 00h
Bit Definitions:
Reserved
7
6
5
4
3
2
1
0
Bits
Name
Reserved
Description
Reserved. Read returns zero.
7:0
Reserved
7
6
5
4
3
2
1
0
Bits
Name
Reserved
Description
Reserved. Read returns zero.
7:0
Reserved
6
OPOL
4
ONHM
3
RDT
2
OHE
1
OH
0
7
5
Bits
Name
Reserved
OPOL
Description
Reserved. Read returns zero.
Off-hook polarity.
1 = Off-hook pin is active-high.
0 = Off-hook pin is active-low.
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.
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 OHE = 1.
7:5
4
3
ONHM
2
RDT
1
OHE
0
OH