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参数资料
| 型号： | W91820AN/824AN |
| 厂商： | WINBOND ELECTRONICS CORP |
| 元件分类： | 无绳电话/电话 |
| 英文描述： | TELEPHONE DIALER CKT, PDIP22 |
| 封装： | PLASTIC, DIP-22 |
| 文件页数： | 18/22页 |
| 文件大小： | 260K |
| 代理商： | W91820AN/824AN |
W91820N SERIES
Publication Release Date: May 1999
- 5 -
Revision A2
Pin Description, continued
SYMBOL
20-PIN
22-PIN
I/O
FUNCTION
HFI, HFO
-
11, 12
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
CURRENT STATE
NEXT STATE
HFO
Low
High
-
Low
High
INPUT
HFI
Off Hook
On Hook
HFO
High
Low
High
DIALING
Yes
No
Yes
No
Yes
The HFI pin is pulled to VDD by an internal resistor.
A detailed timing diagram is shown in Figure 3.
BLOCK DIAGRAM
DTMF
XT
HKS
MODE
RAM
COUNTER
SYSTEM CLOCK
GENERATOR
LOCATION
LATCH
D/A
ROW & COLUMN
PROGRAMMABLE
COUNTER
DATA LATCH
& DECODER
READ/WRITE
HFI
ROW
(R1 ~ R4, Vx/R5)
COLUMN
(C1 ~ C4, Vss)
CONTROL
LOGIC
PULSE
CONTROL
LOGIC
KEYBOARD
INTERFACE
CONVERTER
LOCK
T/P MUTE
HFO
DP
KT
H/P MUTE
相关PDF资料 |
PDF描述 |
|---|---|
| W91820N/824N | TELEPHONE DIALER CKT, PDIP20 |
| W9321S | MU-LAW, ADPCM CODEC, PDSO28 |
| W9412G2CB-5H | 4M X 32 DDR DRAM, 0.6 ns, PBGA144 |
| W9412G2CB-5 | 4M X 32 DDR DRAM, 0.6 ns, PBGA144 |
| W9412G6IH-4 | 8M X 16 DDR DRAM, 0.65 ns, PDSO66 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| W91820LN | 制造商:WINBOND 制造商全称:Winbond 功能描述:13-MEMORY TONE/PULSE DIALER WITH HANDFREE, LOCK AND HOLD FUNCTIONS |
| W91820N | 制造商:WINBOND 制造商全称:Winbond 功能描述:13-MEMORY TONE/PULSE DIALER WITH HANDFREE, LOCK AND HOLD FUNCTIONS |
| W91822AN | 制造商:WINBOND 制造商全称:Winbond 功能描述:13-MEMORY TONE/PULSE DIALER WITH HANDFREE, LOCK AND HOLD FUNCTIONS |
| W91822N | 制造商:WINBOND 制造商全称:Winbond 功能描述:13-MEMORY TONE/PULSE DIALER WITH HANDFREE, LOCK AND HOLD FUNCTIONS |
| W91824AN | 制造商:WINBOND 制造商全称:Winbond 功能描述:13-MEMORY TONE/PULSE DIALER WITH HANDFREE, LOCK AND HOLD FUNCTIONS |
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