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PCT789T-A 参数 Datasheet PDF下载

PCT789T-A图片预览
型号: PCT789T-A
PDF下载: 下载PDF文件 查看货源
内容描述: PCI HSP56世界MicroModem / PCT303DW / PCT1789W\n [PCI HSP56 World MicroModem/PCT303DW/PCT1789W ]
分类和应用: PC
文件页数/大小: 70 页 / 870 K
品牌: ETC [ ETC ]
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PCT1789W DATA SHEET  
PRELIMINARY  
PCT303DW CONTROL REGISTERS  
!!  
International Control 2  
(Register 17, R/W)  
Reserved  
BTE  
ROV  
BTD  
7
6
5
4
3
2
1
0
Reset settings: 00h  
Bit Definitions:  
Bits  
Name  
Description  
7:3  
2
Reserved  
BTE  
Reserved. Read returns zero.  
Billing tone detector enable.  
When set, the PCT303DW can detect a billing tone signal on the line and maintain  
off-hook through the billing tone. If a billing tone is detected, bit 0 (BTD) is set to indi-  
cate the event.  
1
0
ROV  
BTD  
Receive overload. Read-only.  
This bit is set when the receive input detects an excessive input level. This bit is  
cleared by writing a zero to this location.  
Billing tone detected. Read-only.  
This bit is set if bit 2 (BTE) is enabled and a billing tone is detected. This bit is cleared  
by writing a zero to this location.  
International Control 3  
(Register 18, R/W)  
Reserved  
RFWE  
SQLCH  
7
6
5
4
3
2
1
0
Reset settings: 00h  
Bit Definitions:  
Bits  
Name  
Description  
Reserved. Read returns zero.  
Ring detector full-wave rectifier enable. Read-only.  
7:2  
1
Reserved  
RFWE  
When set, the ring-detection circuitry provides full-wave rectification. This effects the  
data stream presented on SDO during ring detection.  
0
SQLCH  
Ring detect network squelch.  
This bit must be set, then cleared, following a polarity reversal detection.  
PRELIMINARY  
PC-TEL, Inc.  
49  
1789W0DOCDAT06A-0299  
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