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參數(shù)資料
| 型號： | HT9302 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | 1-Memory/2-Memory Tone/Pulse Dialer |
| 中文描述： | 1-Memory/2-Memory音頻/脈沖撥號器 |
| 文件頁數(shù)： | 4/27頁 |
| 文件大?。?/td> | 284K |
| 代理商： | HT9302 |
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Pin Name
I/O
Internal
Connection
Description
DTMF
O
CMOS OUT
This pin is active only when the chip transmits tone dialing signals. Otherwise, it
always outputs a low. The pin outputs tone signals to drive the external trans-
mitter amplifier circuit. The load resistor should not be less than 5k .
HDI
I
CMOS IN
Pull-high
This pin is a Schmitt trigger input structure. Active low. Applying a negative go-
ing pulse to this pin can toggle the HDO output once.
An external RC network is recommended for input debouncing. The Pull-high
resistance is 200k
typ.
HDO
O
CMOS OUT
The HDO is a CMOS output structure. Its output is toggle- controlled by a nega-
tive transition on HDI. When HDO is toggled high, PO keeps high to hold the
line.TheholdfunctioncanbereleasedbysettingHFOhighorbyanon-offhook
operation or by another HDI input. Refer to the functional description for the
hold-line function.
HFI
I
CMOS IN
Pull-low
This pin is a Schmitt trigger input structure. Active high. Applying a positive go-
ingpulsetoHFIcantoggletheHFOonceandhencecontrolthehand-freefunc-
tion. The Pull-low resistance of HFI is 200k
An external RC network is recommended for input debouncing.
typ.
HFO
O
CMOS OUT
The HFO is a CMOS output structure. Its output is toggle- controlled by a posi-
tive transition on HFI pin. When HFO is high, the hand-free function is enabled
and PO outputs a high to connect the line.
The hand-free function can be released by setting HDO high or by an on-off-hook
operation or by another HFI input. Refer to the functional description for the
hand-free functional operation.
LOCK
I/O
CMOS IN/OUT
This is a three-state input/output pin, used for controlling long distance call
function with a lock-switch.
LOCK=OPEN: Normal dialing (no lock)
LOCK=VDD: 0, 9 is inhibited for use as the first key input
LOCK=VSS: 0 is inhibited for use as the first key input
DOUT
O
NMOS OUT
NMOS open drain output pin. It outputs the BCD code of the dialing digits to the
LCD driver chip (HT16XX series) or MCU for dialing number display. Refer to
the functional description for the detailed timing.
CLOCK
O
NMOS OUT
NMOS open drain output. When dialing, it outputs a series of pulse trains for
DOUT data synchronization. DOUT data is valid at the falling edge of clock.
VDD
Positive power supply, 2.0V~5.5V for normal operation
VSS
Negative power supply, ground
Approximate internal connection circuits
HT9302 Series
Rev. 1.20
4
September 30, 2002
7
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4
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7
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HT9302A | 1-Memory/2-Memory Tone/Pulse Dialer |
| HT9302B | 1-Memory/2-Memory Tone/Pulse Dialer |
| HT9302C | 1-Memory/2-Memory Tone/Pulse Dialer |
| HT9302D | 1-Memory/2-Memory Tone/Pulse Dialer |
| HT9302G | 1-Memory/2-Memory Tone/Pulse Dialer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT9302_09 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:1-Memory/2-Memory Tone/Pulse Dialer |
| HT9302A | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:1-Memory/2-Memory Tone/Pulse Dialer |
| HT9302ALT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone/Pulse Telephone Dialer |
| HT9302AT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone/Pulse Telephone Dialer |
| HT9302B | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:1-Memory/2-Memory Tone/Pulse Dialer |
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