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參數(shù)資料
| 型號(hào)： | MK53761 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | REPERTORY DIALER |
| 中文描述： | 劇目撥號(hào)器 |
| 文件頁數(shù)： | 4/11頁 |
| 文件大?。?/td> | 199K |
| 代理商： | MK53761 |
Table2
: DTMFOutputFrequency.
Key Input
Standard Frequency
Actual Frequency
% Deviation
ROW
1
2
3
4
697
770
852
941
699.1
766.2
847.4
948.0
+ 0.31
– 0.49
– 0.54
+ 0.74
COL
1
2
3
1209
1336
1477
1215.9
1331.7
1471.9
+ 0.57
– 0.32
– 0.35
PACIFIERTONE OUTPUT/CHIP DISABLE
INPUT
Output.Pin 11. The pacifier tone provides audible
Figure 6 :
TypicalSpectralResponse.
feed-back,confirming that the key has been prop-
erly entered and accepted. A 500 Hz squarewave
isactivateduponacceptanceofavalidkeyinput,af-
terthe 32 ms debouncetime.Thesquarewave ter-
minatesafteramaximumof30ms orwhenthevalid
keyis no longerpresent.In pulsemode, all key en-
tries activate the pacifier tone. In tone mode, any
non-DTMF key (LND, FLASH, MEM, PROG) entry
activatesthe pacifier tone. When programming the
chip,allvalidkeyentriesactivatethepacifiertonein
either pulseor tone mode.
The CHIP DISABLE is an input. When pin 11 is
switchedlow througha resistor (10K to 100K), the
MK53761isenabled.Whenpin11isswitched toV+
through the resistor, all keypad inputs are pulled
high,andtheMK53761willignoreall keypadinputs.
When the chip is disabled,it will notdial, anditcan-
not be programmed.The chip can only bedisabled
when the circuit is inactive (not dialing)and Pin 12
is switchedhigh.
MUTE OUTPUT
Output.Pin 12. This pin is the MUTE OUTPUT for
both tone and pulse modes. Timing is dependent
upon mode.
The MUTE OUTPUT consists of an open drain N-
channeldevice. During standby,the output is high
impedanceandgenerallyhasan externalpullup re-
sistor to thepositive supply.
In the tone mode, MUTE OUTPUT is used to re-
move thetransmitter and the receiver from the net-
work during DTMF signaling. During dialing, MUTE
OUTPUT is active continuouslyuntil dialingis com-
pleted.MUTE OUTPUT goesactive when any key
is pushed.
In the pulse mode, MUTE OUTPUT is used to re-
movethereceiverandthenetworkfromtheline.Dif-
ferentcircuitry is required fortoneandpulsemuting
externaltotheICandapplicationsusingbothmodes
wouldnot necessarily share circuitry. MUTE OUT-
PUTtimingis shownin Figure 8for pulsemode sig-
nalingand Figure 7for tonemodesignaling. MUTE
OUTPUT is active during each digit,and not active
during the interdigit time. In both tone and pulse
modes, MUTE OUTPUT goes active 40 ms before
PULSEOUTPUT for a FLASH. Figure 8 illustrates
the timing for this pin.
HKS
Input.Pin 17. Pin 17 is the hookswitch input to the
MK53761.This isa high-impedanceinput andmust
beswitchedhighforon-hookoperationorlowforoff-
hookoperation.Atransitiononthis inputcausesthe
on-chiplogic to initialize, terminatingany operation
inprogressatthetime.Thesignalingmodedefaults
to the mode selectedat pin 2.
PULSEOUTPUT
Output. Pin 18. This is an output consisting of an
opendrainN-channeldevice.Ineitherpulseortone
mode, the FLASH key will cause a 560 ms output
pulseat pin 18.
MK53761
4/11
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| MK53DN512ZCLQ10 | 功能描述:ARM微控制器 - MCU KINETIS 512K SLCD+ETHNET RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:72 MHz 程序存儲(chǔ)器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT |
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