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參數(shù)資料
| 型號： | W91080A |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | Tone/Pulse Dialer With Handfree And Keytone Fuctions And One Number Memory(具有一個數(shù)碼存儲器免提和主鍵音功能的音頻/脈沖撥號器) |
| 中文描述： | TELEPHONE DIALER CKT, PDIP20 |
| 封裝： | PLASTIC, DIP-20 |
| 文件頁數(shù)： | 4/12頁 |
| 文件大小： | 93K |
| 代理商： | W91080A |
W91080 SERIES
- 4 -
Pin Description, continued
SYMBOL
18-PIN
-
20-PIN
10, 11
I/O
I, O
FUNCTION
HFI, HFO
Handfree control pins.
Handfree control state is toggled by a low pulse on the
HFI input pin. Status of the handfree control state is
described in the following table:
CURRENT STATE
Hook SW.
-
On Hook
Off Hook
On Hook
Off Hook
Off Hook
HFO
Low
High
Low
High
-
High
Input
Off Hook
On Hook
On Hook
HFO
High
Low
High
-
Dialing
Yes
No
Yes
Yes
Yes
No
NEXT STATE
Low
Low
HFI
HFI
HFI
HFI
is pulled to V
DD
by an internal resistor.
Key-tone signal output. The key tone will be generated in
pulse mode and when operation and function keys (R/P, S,
F1, F2, */T) are pressed in tone mode. Frequency is 600 Hz
and duration is 35 mS.
KT
5
5
O
BLOCK DIAGRAM
MODE
HFO
XT
ROW
(R1 to R4)
COLUNM
(C1 to C4)
DTMF
ROW & COLUMN
PROGRAMMABLE
COUNTER
SYSTEM CLOCK
GENERATOR
DATA LATCH
& DECODER
KT
KEYBOARD
INTERFACE
D/A CONVERTER
XT
HKS
HFI
CONTROL
LOGIC
CONTROL
LOGIC
PULSE
T/P MUTE
DP/C5
LOCATION
LATCH
RAM
READ/WRITE
COUNTER
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