Reset settings = 0000_1000b (0x08) SF5 (DAA5). DAA Low Level " />
參數資料
型號: SI2400-BS
廠商: Silicon Laboratories Inc
文件頁數: 72/94頁
文件大?。?/td> 0K
描述: IC ISOMODEM SYSTEM-SIDE 16SOIC
標準包裝: 48
系列: ISOmodem®
數據格式: V.21,V.22,V.23,Bell 103,Bell 212A
波特率: 2.4k
電源電壓: 3 V ~ 5.25 V
安裝類型: 表面貼裝
封裝/外殼: 16-SOIC(0.154",3.90mm 寬)
供應商設備封裝: 16-SOIC N
包裝: 管件
配用: 336-1166-ND - BOARD EVAL FOR SI2400 ISOMODEM
Si2400
74
Rev. 1.3
Reset settings = 0000_1000b (0x08)
SF5 (DAA5). DAA Low Level Functions 5
Bit
D7D6D5D4D3
D2
D1
D0
Name
FULL
DCTO
OHS
ACT
DCT
RZ
RT
Type
R/W
Bit
Name
Function
7FULL
Full Scale.
0 = Si3015 ADC/DAC full scale > –1 dBm.
1 = Si3015 ADC/DAC full scale > 3.2 dBm.
This bit changes the full scale of the ADC and DAC from –1 dBm min. to 3.2 dBm min. In
order to use this bit, the R2 resistor must be changed from 402
Ω to 243 Ω and ACT
(SF5, bit 4) must be set to 0. This bit is intended for use only in voice communications
and may be used in PCM modes.
6DCTO
DC Termination Off.
0 = Normal operation. The OFF bit must always be set to 0 when on-hook.
1 = DC termination disabled and the device presents an 800
Ω dc impedance to the line
which is used to enhance operation with an off-hook parallel phone.
5OHS
0 = The Si2400 will execute a fast on-hook.
1 = The Si2400 will execute a slow, controlled on-hook.
4ACT
0 = Real impedance.
1 = Complex impedance.
3:2
DCT
DC Termination Voltage (See Table 13 and “Appendix A—DAA Operation”).
00 = Low Voltage Mode (transmit level = –5 dBm).
01 = Japan mode (transmit level = –3 dBm).
10 = USA mode (transmit level = –1 dBm).
11 = CTR21/France current limit mode (transmit level = –1 dBm).
1RZ
Ringer Impedance.
0 = Maximum (high) ringer impedance.
1 = Synthesize ringer impedance.
0RT
Ringer Threshold Select.
Used to satisfy country requirements on ring detection. Signals below the lower level will
not generate a ring detection; signals above the upper level are guaranteed to generate
a ring detection.
0 = 11 to 22 VRMS.
1 = 17 to 33 VRMS.
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