Datasheet > AS2578BN

AS2578BN

更新时间： 2024-02-17 00:24:32

品牌	Logo	应用领域
艾迈斯 - AMSCO		控制器电话
页数	文件大小	规格书
22页	283K
描述
TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS

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数据手册

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AS2578BN 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Contact Manufacturer	零件包装代码：	DIP
包装说明：	DIP,	针数：	28
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.65	JESD-30 代码：	R-PDIP-T28
JESD-609代码：	e3	湿度敏感等级：	3
功能数量：	1	端子数量：	28
封装主体材料：	PLASTIC/EPOXY	封装代码：	DIP
封装形状：	RECTANGULAR	封装形式：	IN-LINE
峰值回流温度（摄氏度）：	NOT SPECIFIED	认证状态：	Not Qualified
标称供电电压：	5 V	表面贴装：	NO
电信集成电路类型：	TELEPHONE MULTIFUNCTION CIRCUIT	端子面层：	MATTE TIN
端子形式：	THROUGH-HOLE	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	Base Number Matches：	1

AS2578BN 数据手册

Data Sheet

AS2578 /B

Furthermore, the mode can be selected by setting the

LM code (see setup menu). If no LM code is set, the

mode will be determined by the MODE pin.

ValidKeys

The keyscanning is enabled when CE or HS are high.

During setup the keyboard is disabled. A valid key is

detectedfromthekeyboardbyconnectingtheappropriate

row to the column. This can be done using an n x m

keyboard matrix with single contacts. Positive and

negative edges of each contact are debounced. The

debounce time is 15 ms.

When default LD mode is selected, a temporary change

to MF mode can be invoked by pressing * (AP = high,

AS2578 only) or Set, * , Set.

When the circuit is in temporary MF mode, each of the

following procedures revert it to default LD mode:

MuteKey

- pressing Set, * , Set ,

Themutekeyisonlyenabledwhenoff-hook.Depressing

the mute key activates and deactivates (toggle switch)

the MUTE output, when internal mute is inactive, i.e. in

speech mode.

- pressing recall key (by further entries of the recall key

the signalling mode will toggle between MF and LD,

- by next On-hook.

Any key entry overwrites a mute activated by the mute

key, and mute will be deactivated.

LastNumberRedial

LNR is a facility that allows resignalling of the last

manually dialled number without keying in all the digits

again. The LNR is repeatable.

Centrex Keys (AS2578B only)

The alphameric keys accommodate easy use of centrex

services. The A, B, C and D keys are only valid in MF

mode and are not storable. Pressing one of these keys

will invoke the appropriate MF tones to be transmitted.

The centrex keys are not stored in the RAM, but are

buffered in the FIFO, and subsequently entered digits

are also buffered in the FIFO.

The current contents of the RAM are overwritten by new

entries.

Amanuallyenterednumberisautomaticallystoredinthe

LNR RAM. The capacity of the RAM is 30 digits. If a

number greater than 30 digits is entered, the LNR facility

will be inhibited (until new entries < 31 digits) and further

entries will be buffered in FIFO.

Pressingtherecallkeyafterasequenceincludingcentrex

keys will reset the RAM counter, and subsequently

entereddigitswillbestoredintheRAM. IfMFselect(Set,

* , Set) has been invoked once, then all susequently

digits/data will be buffered in the FIFO.

Postdialled digits, i.e. digits manually entered after LNR

has been invoked, are not stored in RAM but buffered in

FIFO.

Memory Keys

The keys M1 to M3 are direct memory access keys and

the MEM key is used for abbreviated dialling.

RecallFunction

A recall activation will invoke a flash (timed loop break)

or a ground loop (GL) depending on the selected LM

code, which is stored in the external EEPROM (see

setup menu).

13 numbers can be stored in on chip RAM. Each number

can contain up to 20 digits (including pauses).

If no LM code is set, depressing the recall key will invoke

both a flash and a GL, however, in LD mode a Flash is

never executed.

IfanEEPROMisconnectedtotheserialbus, thecontent

of the RAM is written into the EEPROM when CE is

turned low indicating a power loss.

If recall is the first entry in a digit string, it will be stored

in LNR RAM when digit(s) are entered after the recall.

During programming multible pauses can be inserted by

pressing the LNR key.

If the recall key is depressed after a digit string has been

entered or dialled out, the recall will not be stored, and

subsequently entered digits will be stored in the LNR

RAM as the new number.

Memory dialling is cascadable.

ModeSelection

The default mode (LD or MF) can be selected by the

MODE pin.

If pressing the recall key is not followed by digit entries,

the LNR RAM remains intact.

Rev. 3

March 1997

1 2 345 6 7...22

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与AS2578BN相关器件

型号	品牌	描述	获取价格	数据表
AS2578BP	AMSCO	TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS	获取价格
AS2578N	AMSCO	TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS	获取价格
AS2578P	AMSCO	TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS	获取价格
AS2590	AMSCO	LC DISPLAY DRIVER WITH 18 DIGITS, 6 SYMBOLS AND CLOCK/TIMER	获取价格
AS2590N	AMSCO	LC DISPLAY DRIVER WITH 18 DIGITS, 6 SYMBOLS AND CLOCK/TIMER	获取价格
AS2590P	AMSCO	LC DISPLAY DRIVER WITH 18 DIGITS, 6 SYMBOLS AND CLOCK/TIMER	获取价格

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