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參數資料
| 型號： | W91F840AN |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | 23-Flash Memory Tone/Pulse Dialer With Handfree,Hold And Lock Functions(具有23個閃速存儲器、免提、保持和上鎖功能的音頻/脈沖撥號器) |
| 中文描述： | TELEPHONE DIALER CKT, PDIP24 |
| 封裝： | 0.600 INCH, PLASTIC, DIP-24 |
| 文件頁數： | 5/23頁 |
| 文件大小： | 207K |
| 代理商： | W91F840AN |
W91F840N SERIES
Publication Release Date: July 1999
- 5 -
Revision A2
Pin Description, continued
SYMBOL
22-PIN 24-PIN 28-PIN I/O
FUNCTION
V1, V2
-
-
14, 15
O
Volume control output pins. These two pins can be
toggled by the volume control keys (Vup, Vdown).
These two pins output is a conventional CMOS N-
channel open drain output.
HFI, HFO
-
12, 13
13, 16 I, O Handfree control pins.
A low pulse on the HFI input pin toggles the
handfree control state. The status of the handfree
control state is listed in the following table:
HOOK SW.
-
On Hook
Off Hook
On Hook
Off Hook
Off Hook
CURRENT STATE
NEXT STATE
HFO
Low
High
High
-
Low
High
INPUT
HFI
HFI
HFI
Off Hook
On Hook
On Hook
HFO
High
Low
Low
Low
Low
High
DIALING
Yes
No
Yes
Yes
No
Yes
The HFI pin is pulled to V
DD
by an internal resistor.
A detailed timing diagram is shown in Figure 3.
BLOCK DIAGRAM
DTMF
XT
XT
HKS
MODE
RAM
COUNTER
SYSTEM CLOCK
GENERATOR
LOCATION
LATCH
D/A
ROW & COLUMN
PROGRAMMABLE
COUNTER
DATA LATCH
& DECODER
READ/WRITE
HFI
ROW
(R1 ~ R7)
COLUMN
(C1 ~ C6)
T/P MUTE
KT
HFO
H/P MUTE
CONTROL
LOGIC
PULSE
CONTROL
LOGIC
KEYBOARD
INTERFACE
CONVERTER
LOCK
DP
K MUTE
V1
V2
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| W91F842AN | 23-Flash Memory Tone/Pulse Dialer With Handfree,Hold And Lock Functions(具有23個閃速存儲器、免提、保持和上鎖功能的音頻/脈沖撥號器) |
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