参数资料
型号: SI3050-E1-FT
厂商: Silicon Laboratories Inc
文件页数: 42/128页
文件大小: 0K
描述: IC VOICE DAA SYSTEM SIDE 20TSSOP
标准包装: 74
系列: *
Si3050 + Si3011/18/19
20
Rev. 1.5
4. AOUT PWM Output
Figure 19 illustrates an optional circuit to support the
pulse width modulation (PWM) output capability of the
Si3050 for call progress monitoring purposes. To enable
this mode, the INTE bit (Register 2) should be set to 0,
the PWME bit (Register 1) set to 1, and the PWMM bits
(Register 2) set to 00.
Figure 19. 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 transmit and receive 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
three different PWM output modes for the AOUT signal,
including a delta-sigma data stream, a 32 kHz return to
0 PWM output, and a balanced 32 kHz PWM output.
AOUT
+5VA
R41
LS1
Q6
C41
Table 12. 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
1/10 W, ±5%
Venkel, SMEC,
Panasonic
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