參數(shù)資料
型號(hào)： TLC32045IN
廠商： Texas Instruments, Inc.
英文描述： VOICE-BAND ANALOG INTERFACE CIRCUITS
中文描述： 語(yǔ)音頻帶模擬接口電路
文件頁(yè)數(shù)： 12/39頁(yè)
文件大?。?/td> 535K
代理商： TLC32045IN
TLC32044C, TLC32044E, TLC32044I, TLC32044M TLC32045C, TLC32045I
VOICE-BAND ANALOG INTERFACE CIRCUITS
SLAS017F – MARCH 1988 – REVISED MAY 1995
12
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
secondary DX serial communication protocol
x x |
←
to TA register
→
| x x |
←
to RA register
→
|
x |
←
to TA’ register
→
| x |
←
to RA’ register
→
|
x |
←
to TB register
→
| x |
←
to RB register
→
|
x x x x x x d9
0
0
d13 and d6 are MSBs (unsigned binary)
0
1
d14 and d7 are 2’s complement sign bits
1
0
d14 and d7 are MSBs (unsigned binary)
x d7 d6 d5 d4 d3 d2
1
1
Control
Register
d2 = 0/1 deletes/inserts the A/D high-pass filter
d3 = 0/1 disables/enables the loopback function
d4 = 0/1 disables/enables the AUX IN+ and AUX IN–
d5 = 0/1 asynchronous/synchronous transmit and receive sections
d6 = 0/1 gain control bits (see gain control section)
d7 = 0/1 gain control bits (see gain control section)
d9 = 0/1 delete/insert on-board second-order (sin x)/x correction filter
reset function
A reset function is provided to initiate serial communications between the AIC and DSP. The reset function
initializes all AIC registers, including the control register. After power has been applied to the AIC, a
negative-going pulse on RESET initializes the AIC registers to provide an 8-kHz A/D and D/A conversion rate
for a 5.184 MHz master clock input signal. The AIC, except the control register, is initialized as follows (see AIC
DX data word format section):
REGISTER
INITIALIZED
REGISTER
VALUE (HEX)
TA
9
TA’
1
TB
24
RA
9
RA’
1
RB
24
The control register bits are reset as follows (see AIC DX data word format section):
d9 = 1, d7 = 1, d6 = 1, d5 = 1, d4 = 0, d3 = 0, d2 = 1
This initialization allows normal serial port communications to occur between AIC and DSP. If the transmit and
receive sections are configured to operate synchronously and the user wishes to program different conversion
rates, only the TA, TA’, and TB register need to be programmed, since both transmit and receive timing are
synchronously derived from these registers (see the terminal functions table and AIC DX word format sections).
The circuit shown in Figure 1 provides a reset on power up when power is applied in the sequence given under
power-up sequence. The circuit depends on the power supplies reaching their recommended values a minimum
of 800 ns before the capacitor charges to 0.8 V above DGTL GND.
VCC+
VCC–
RESET
200 k
0.5
μ
F
TLC32044/TLC32045
5 V
–5 V
Figure 1. Power-Up Reset
相關(guān)PDF資料
PDF描述
TLC32044E VOICE-BAND ANALOG INTERFACE CIRCUITS
TLC32044I VOICE-BAND ANALOG INTERFACE CIRCUITS
TLC32044M VOICE-BAND ANALOG INTERFACE CIRCUITS
TLC32044MFK VOICE-BAND ANALOG INTERFACE CIRCUITS
TLC32045C VOICE-BAND ANALOG INTERFACE CIRCUITS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TLC32046 制造商:TI 制造商全稱:Texas Instruments 功能描述:Wide-Band Analog Interface Circuit
TLC32046C 制造商:TI 制造商全稱:Texas Instruments 功能描述:Wide-Band Analog Interface Circuit
TLC32046CN 制造商:Rochester Electronics LLC 功能描述:- Bulk
TLC32046I 制造商:TI 制造商全稱:Texas Instruments 功能描述:Wide-Band Analog Interface Circuit
TLC32046IN 制造商:Rochester Electronics LLC 功能描述:- Bulk
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