参数资料
型号: SI3056SSI-EVB
厂商: Silicon Laboratories Inc
文件页数: 13/94页
文件大小: 0K
描述: BOARD EVAL SI3056/SI3018 SSI
标准包装: 1
主要目的: 电信,数据采集装置(DAA)
已用 IC / 零件: Si3056
已供物品: 板,CD
Si3056
Si3018/19/10
20
Rev. 1.05
4. AOUT PWM Output
Figure 18 illustrates an optional circuit to support the pulse width modulation (PWM) output capability of the Si3056
for call progress monitoring purposes. Set the PWME bit (Register 1, bit 3) to enable this mode.
Figure 18. AOUT PWM Circuit for Call Progress
Registers 20 and 21 allow the receive and transmit paths to be attenuated linearly. When these registers are set to
all 0s, the receive and transmit paths are muted. These registers affect the call progress output only and do not
affect transmit and receive operations on the telephone line.
The PWMM[1:0] bits (Register 1, bits 5:4) select one of the three different PWM output modes for the AOUT signal,
including a delta-sigma data stream, a conventional 32 kHz return to zero PWM output, and balanced 32 kHz PWM
output.
Table 13. Component Values—AOUT PWM
Component
Value
Supplier
LS1
Speaker BRT1209PF-06
Intervox
Q6
NPN KSP13
Fairchild
C41
0.1 F, 16 V, X7R, ±20%
Venkel, SMEC
R41
150
, 1/16 W, ±5%
Venkel, SMEC, Panasonic
+5 VA
LS1
Q6
NPN
R41
C41
AOUT
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