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參數(shù)資料
| 型號： | W91521A |
| 英文描述： | Tone/Pulse Telephone Dialer |
| 中文描述： | 音頻/脈沖電話撥號器 |
| 文件頁數(shù)： | 4/16頁 |
| 文件大小： | 193K |
| 代理商： | W91521A |
W91520N SERIES
- 4 -
Pin Description, continued
SYMBOL
18-PIN
20-PIN
I/O
FUNCTION
HFI, HFO
-
10, 11
I, O
Handfree control pins. The handfree control state is
toggled on by a low pulse on the HFI input pin. The
status of the handfree control state is described in the
following table:
CURRENT STATE
Input
HFO
Dialing
High
Yes
On Hook
High
Low
No
Off Hook
High
Low
Yes
On Hook
Off Hook
Off Hook
Low
Yes
Low
On Hook
Low
No
Yes
Off Hook
High
On Hook
High
Low
Hook SW.
HFO
NEXT STATE
HFI
HFI
HFI
HFI pin is pulled to V
DD
by an internal resistor.
Detailed timing diagrams are shown in Figure 3.
BLOCK DIAGRAM
ROW
COLUMN
(C1 to C4)
DTMF
XT
XT
RAM
COUNTER
SYSTEM CLOCK
GENERATOR
LOCATION
LATCH
D/A
ROW & COLUMN
PROGRAMMABLE
COUNTER
DATA LATCH
& DECODER
READ/WRITE
(R1 to R4, Vx)
T/P MUTE
HFO
CONTROL
LOGIC
PULSE
CONTROL
LOGIC
KEYBOARD
INTERFACE
CONVERTER
MODE
HKS
HFI
DP/C5
H/P MUTE
相關PDF資料 |
PDF描述 |
|---|---|
| W91520AN | TONE/PULSE DIALER WITH HANDFREE AND HOLD FUNCTION |
| W91520N | TONE/PULSE DIALER WITH HANDFREE AND HOLD FUNCTION |
| W91521AN | TONE/PULSE DIALER WITH HANDFREE AND HOLD FUNCTION |
| W91521N | TONE/PULSE DIALER WITH HANDFREE AND HOLD FUNCTION |
| W91540 | Tone/Pulse Telephone Dialer |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| W91521AN | 制造商:WINBOND 制造商全稱:Winbond 功能描述:TONE/PULSE DIALER WITH HANDFREE AND HOLD FUNCTION |
| W91521N | 制造商:WINBOND 制造商全稱:Winbond 功能描述:TONE/PULSE DIALER WITH HANDFREE AND HOLD FUNCTION |
| W91530 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:13-MEMORY TONE/PULSE DIALER WITH SAVE, KEYTONE, LOCK,AND HANDFREE FUNCTION |
| W91530A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:Tone/Pulse Telephone Dialer |
| W91530AN | 制造商:WINBOND 制造商全稱:Winbond 功能描述:13-MEMORY TONE/PULSE DIALER WITH SAVE, KEYTONE, LOCK,AND HANDFREE FUNCTION |
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