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參數(shù)資料
| 型號： | PCT789T-A |
| 英文描述： | PCI HSP56 World MicroModem/PCT303DW/PCT1789W |
| 中文描述： | 世界MicroModem/PCT303DW/PCT1789W的PCI HSP56 |
| 文件頁數(shù)： | 42/70頁 |
| 文件大?。?/td> | 872K |
| 代理商： | PCT789T-A |
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PC-TEL, Inc.
42
1789W0DOCDAT06A-0299
PCT1789W DATA SHEET
PCT303DW C
ONTROL
R
EGISTERS
!
PRELIMINARY
PRELIMINARY
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
RDTN
6
RDTP
5
OPOL
4
ONHM
3
RDT
2
OHE
1
OH
0
Bits
Name
Reserved
RDTN
RDTP
OPOL
Description
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.
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.
0 = Reset either 4.5–9 seconds after last positive ring is detected or when the system
executes an off-hook.
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.
7
6
5
4
3
ONHM
2
RDT
1
OHE
0
OH
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