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參數(shù)資料
| 型號： | 935260608118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | TELEPHONE MULTIFUNCTION CKT, PDSO28 |
| 封裝： | PLASTIC, SOT-136, SO-28 |
| 文件頁數(shù)： | 21/56頁 |
| 文件大?。?/td> | 360K |
| 代理商： | 935260608118 |
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2000 May 19
28
Philips Semiconductors
Product specication
One-chip telephone ICs with speech,
dialler and ringer functions
UBA2050(A); UBA2051(A;C)
ON-LINE STATE
This section describes all the actions of the UBA205xx
during the on-line state. This state starts with making
output DP/FL HIGH (external pull-up resistor), which
makes line current flow possible.
The on-line state contains a number of sub-states
(see Fig.29):
Conversation state
Dialling state
Memory recall state
Program state.
handbook, full pagewidth
MGU187
CONVERSATION
PROGRAM
DIALLING
MEMORY RECALL
[LNR/P], [M1 to M3], [MEM]
+ [0] to [9]
[M1 to M3], [MEM]
+ [0] to [9]
on-hook/line break
off-hook
dial keys
end of recall
end
[STORE]
ON-LINE
STANDBY
off-hook
RINGER
Fig.29 On-line states.
Conversation state
In this state, conversation is possible.
Dialling state
During the dial-key entries the UBA205xx starts
immediately with transmission of the digit(s); the minimum
transmission time is unaffected by the speed of the entry.
Transmission continues as long as further dial-key entries
have to be processed.
However when more than 32 digits are dialled the
LNR memory will overflow and the last number redial
function will be inhibited.
There are two dial modes: pulse dialling and tone dialling.
The initial dialling mode is determined by resistor option
PTS.
The state machine which controls the dialling mode is
illustrated in Fig.30.
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