How it Works
Datasheet
Loading...
EM91865A
Datasheet (ELAN)
20 pgs137.69 Kb0

Datasheet EM91865B, EM91865A Datasheet (ELAN)

Download
Page 1
EM91865
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
Preliminary
GENERAL DESCRIPTION
time for application in PABX system. EM91865 also have a special I/O pin - VAO can used tocontrol
the receive volume amplify circuit.
FEATURES
• Volume add Control Function.
• One key Redial Function.
• Flash key is available and have multiple Flash time ( 600 ms, 300 ms, 100 ms ) can be selected.
• Auto Insert Pause Time.
• Tone/Pulse Switchable.
• Pulse mode fixed 10PPS.
• Pulse to tone ( P→T ) key is provided for PABX operation.
• Many options can be selected by R option. Mode ( Pulse, Tone ) M/B ratio ( 40:60 ; 33:66 ) Auto insert pause time ( enable ; disable )
• 13 sets 16 digits one touch memory, or 3 set one touch and ten set two touch 16 digits
• One set 32 digits SAVE function.
• One set 32 digits LNB redial function.
• Mixed and cascaded dialing.
• Hold and Mute function.
• Hand Free dialing.
• Tone duration and inter -tone pause are fixed at 90 ms.
• Flash pause time are fixed at 600 ms.
• Pulse to Tone pause time are fixed at 3.6sec.
• Uses 3.579545 MHz crystal or ceramic resonator (with built-in capacitor, no need extra capacitor).
• Package in DIP 18 or DIP 16.
memory.
Total System
• Operating voltage : 2.0V ~ 5.5V
• Operating current : Tone mode 0.3 mA (typical) ~ 0.5 mA
Pulse mode 0.15 mA (typical) ~ 0.2 mA
• Standby current : 0.01 uA ( typical ) 0.1 uA ( max. )
• Use single clock 3.579545 MHz crystal
* This specification are subject to be changed without notice.
4.28.1999
1
Page 2
PIN ASSIGNMENTS
EM91865
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
Preliminary
EM91865B
K7
1 2
K5
3 4
XIN
5
XOUT
VSS
VAO
HFI
6 7 8 9
18 17 16 15 14 13 12 11 10
K8 K3 K2 K1/HDO DTMF PO HKS VDD HFO
K7
K6/XMUTE
K5
K4/MUTEO
XIN
XOUT
VSS
VAO
EM91865A
16 15 14 13 12 11 10
9
K8 K3 K2 K1/HDO DTMF PO HKS VDD
1 2 3 4 5 6 7 8
K6/XMUTE
K4/MUTEO
PIN DESCRIPTIONS
Symbol Function
K2 , K3 , K5 ~ K8 Key board scan I/O pins, key scans by ripple way. I/O pin These pins output 16K Hz signal one by one and periodically for key board scan.
K1/HDO This pin has two functions
Normally this pin will be a Key board scan pins function same as K1~K8. In Hold condition this pin will stay in "High" level to control the Hold circuit and scan HD input key. In Hold condition all key will not allow keying except HD, HF and Hook switch.
K4/MuteO This pin has two functions
Normally this pin will be a Key board scan pins function same as K1~K8. In MUTE condition this pin will stay in "High" level and output signal with the inverse of key scan to control the MUTE circuit and scan input key. Any key input will release MUTE condition.
K6/XMUTE This pin has two functions
Normally this pin will be a Key board scan pins function same as K1~K8. The Tone/Pulse dialing Mute signal output pin. This pin will switch to "High" level during
Tone/Pulse dialing and hold function. Otherwise, this pin DC level stays "Low". VDD, VSS Positive and negative power supply input pin Xin, Xout Oscillator input and output pins, built in two 5pf capacitor so it's not need external capacitor.
A 3.579545 MHz crystal must be crossed between Xin and Xout. HFI Handfree function Input pin accepts rising edge signal to turn "on" or turn "off" handfree
function. This pin is hysteresis input structure and built-in pull down resistor (typically 200
KΩ) . HFO Handfree outputs pin that is designed to control telephone line for on-hook dialing or control
speakerphone circuit for handfree conversation. When handfree function is executed, this pin
will switch to "High". Otherwise, this pin stays "Low" level. HKS Hook Switch detects input pin, which is hysteresis input structure and without internal pull
up resistor. DTMF DTMF (Dual Tone Multi-Frequency) output pin, In tone dialing mode, this pin will output
DTMF signal that is corresponding to key board 0~9, *, # key. PO Pulse signal output pin that is NMOS open-drain. This pin is for pulse dialing. This output is
"Low" during pulse dialing blank duration and Flash operation active, otherwise will be "High
impedance". VAO Volume Add output pin , which is open drain structure.
Normally this pin will stay in "High Impedance". When Volume add active and dialer in OFF-
HOOK mode operting then this pin will output "Low".
* This specification are subject to be changed without notice.
4.28.1999
2
Page 3
Key Assignment :
K1
HD
K2
RD
K3
123
K4
45 6
K5
78 9
K6
*/T
K7
SAVE
0
EM2
EM91865
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
Preliminary
MUTE
P
#
EM3EM1
F1
ST
VA
F2
RC
F3
M0
M9
K8
M1
HDO MuteO
M2 M3 M4 M7
RR R
R_option
KEYBOARD DESCRIPTION :
Key Description
0~9, *, # Digit key F1, F2, F3 Flash key, flash time F1=600ms F2=300ms F3=100ms */T In Pulse mode, this key mean Pulse to Tone function key RD Redial and One key Redial key P Pause key. HD Hold function key, at hold mode to key in "HD" key will go to idle On-hook
state HF Handfree function key SAVE SAVE function key ST Store memory function key EM1~EM3, M1~M10 One touch memory function key RC Recall key for two touch memory Recall VA Volume Add key. MUTE MUTE key. When this key be pressed MuteO output will be "high", and
any key-in will release mute.
M6M5
XMUTE
R_option
M8
* This specification are subject to be changed without notice.
4.28.1999
3
Page 4
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
Preliminary
FUNCTION DESCRIPTIONS
Dialer Option selection
The EM91865 incorporated a special keyboard scanning function that is connecting a resistor ( typically is 560 KΩ ) on keyboard scan pin to select many telephone specifications.
The specifications are described as follow :
a. M/B ratio
K2 M/B ratio NR 40:60 R-Vss 33:66
b. Auto Insert Pause time d. Mode
K3 Auto Insert K5 Mode
Pause time NR Disable NR Tone R-Vss Enable R-Vss Pulse
EM91865
Normal Dialing :
Press the digital key directly on keyboard which number can be dialing out and stored in LNB memory auto matically. Operating procedure described as following:
• To select Pulse or Tone mode.
• Off-Hook or turn on HF function.
• Keying d1,d2,....dn. The "d" expressed digital key pressed that include 1~9, *, 0, #, P, and P→T keys. The "n"
expressed unlimited.
• The numbers d1,d2,......, dn will be dialed out in Pulse or Tone mode as selection.
LNB Redial Function :
Storing :
In normal dialing mode, every digital key was entry which number will be stored in LNB memory automatically. If entry digits are more than 32 digits, the redial function of LNB memory will be disabled, otherwise, these numbers stored in LNB memory can be redial output.
Redialing :
EM91865 provide Redial and One Key Redial function
(1) Redial function
Off-Hook normal dialing directly keying "F" key (or ON-OFF Hook once) and key-in "RD" keyboard. The numbers stored in LNB memory will be dialed out.
(2) One Key Redial function
Off-Hook normal dialing, if busy, press the "RD" key directly then the line will be broken about 1.2 sec with Trp redial pause time and dial out the numbers stored in LNB memory automatically.
* This specification are subject to be changed without notice.
4.28.1999
4
Page 5
EM91865
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
Auto Insert Pause Time Function
Preliminary
EM91865 Provides a new function - Auto Insert Pause Time function - for PABX system user. In PABX system, we usually use a special number to identify the phone want dial out or just a internal phone. So between the first and second number, the PABX system will switch to central office, that will be few second switch time. The auto insert pause time function will auto insert the pause time between first and second digit in redialing mode. This function are provide a pause time to wait PABX switch to Central Office. In fact, the pause time are record the waiting time of last dialing between the first and second digit. The auto insert pause minimum duration are equal 0 second, maximun duration are equal 3.5 second, and pause duration scale are 0.1 second. So, if the time during user keying first and second digit are longer than 3.5 seconds, the auto insert pause time will be limited at 3.5 second. By this function, we can redial the correct number out in PABX system. This function can select enable or disable by R_option.
Pause(P) key operation
The Pause(P) key is designed to support pause operation in dialing duration. "P" key can be stored in memory and it will occupy one digital position.
• To select Pulse or Tone mode.
• Off-hook(or turn on HF function), push (d1, d2,....dn, P , k1, k2, ..... ,kn). These numbers will be dialed out
as following sequence :
d1, d2,.....dn, Tp, k1, k2, ..... ,kn (Tp are the pause Time)
SAVE redial memory
The SAVE memory is designed in EM91865 to support digits capacity buffer for second redial, pager, special memory for memo and other system applications.
Storing : EM91865 support two operating methods to store numbers into SAVE redial memory. Method 1 :
• To select Pulse or Tone mode.
• Off-hook(or turn on HF function), push d1, d2 ....., dn. The numbers d1, d2,..., dn will be dialed out in Pulse
or Tone mode as selection.
• After dn had been dialed out and push [ST]. SAVE key. If the keying numbers are more than 32 digits that content of SAVE memory can not be updated. Otherwise, these numbers will be stored into SAVE memory.
Noted : In the [ ] key allows to be omitted.
• SAVE buffer are the length 32 digits number.
Method 2 :
On or Off-hook (or turn on HF function), push ST, d1, d2 ....., dn, [ST], SAVE. If the keying are not over 32 digits,
the numbers d1, d2, ....., dn will be stored in SAVE redial memory automatically.
Dialing
• To select Pulse or Tone mode.
• Off-hook (or turn on HF function or after executing Flash function), first push SAVE key. The numbers stored in SAVE memory will be dialed out in Pulse or Tone mode as selection.
* This specification are subject to be changed without notice.
4.28.1999
5
Page 6
EM91865
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
One Touch memory :
Preliminary
The EM91865 incorporated 13 sets one touch memory each one can store numbers up to 16 digits. In memory storing, if stored numbers are more than 16 digits that only the previous 16 digits can be stored into specific memory.
Storing of 13 sets memory :
On-Hook or Off-Hook state, push (ST, d1, d2,.....di, [ST], EMn or Mn). The numbers d1, d2,....di will be stored
into memory location "n", the "n" expressed digital key from 1~3 for EM and 0~9 for M.
Dialing (after memory dialed out, the numbers of memory will copy to LNB) :
• To select Pulse or Tone mode.
• Off-hook (or turn on HF function), push EMn or Mn key. The memory content will be dialed out.
Two Touch memory :
The EM91865 incorporated 10 sets two touch memory each one can store numbers up to 16 digits. In memory storing, if stored numbers are more than 16 digits that only the previous 16 digits can be stored into specific memory.
Storing of 10 sets two Touch memory :
On-Hook or Off-Hook state, push (ST, d1, d2,.....dn, ST, m). The numbers d1, d2,....dn will be stored into memory
location "Mm", the "m" expressed digital key from 0~9 map to M0~M9.
Dialing (after memory dialed out, the numbers of memory will copy to LNB) :
• To select Pulse or Tone mode.
• Off-hook(or turn on HF function), push(RC , m). The memory content in Mm will be dialed out.
Cascade dialing :
Let EM1=1,2,3
EM2=4,5,6
EM3=7,8,9 At off-hook state, key in EM1, EM2, EM3, the LNB=1,2,3,4,5,6,7,8,9, and the number will be dialed out. The max. cascade dialing numbers are 32 digits.
Mixing dialing :
Let LNB=7,8,9
M2=4,5,6
EM1=1,2,3 At off-hook state, key in "RD", EM1, *, 0, P, ( A , 2 ) , then the LNB=7,8,9,1,2,3,*, 0, P,4,5,6, and the number will be dialed out.
Pulse to Tone(*/T) key operation
The Pulse to Tone(*/T) key is designed to support toll dialing (long distance call) or PABX system operation. The "*/T" key can be stored in memory and it will be occupy one digital position.
• To select Pulse mode.
• Off-hook(or turn on HF function), push d1, d2,...dn, */T, k1, k2, ....,kn. These numbers will be dialed out as
following sequence :
* This specification are subject to be changed without notice.
4.28.1999
6
Page 7
EM91865
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
Preliminary
d1, d2,....dn, Tpt, k1, k2, .....,kn. (Tpt are the Pulse to Tone pause time)
(pulse mode) (tone mode)
Flash(F=F1,F2,F3) key operation
The Flash key is designed to break telephone line temporarily. After key is depressed, this dialer will send a flash signal to break line and reset all condition. The Flash's break time dependent on the which key be pressed, F1=600ms, F2=300ms, F3=100ms.
Handfree (HF) function
The Handfree function are provided in advance version EM91865B to support on-hook dialing and loudspeaker application which can be turn "on" or "off" by pressed again "HF" key. During handfree function is executed, the HFO pin is switched to "high". Otherwise the HFO pin stays "low" level. One of the following operations can turn off Handfree function (HFO pin return to "Low").
• On-Off hook once.
• Pressed "HF" key
• Turn on Hold (HD) function.(HDO pin switched to "High")
Hold (HD) function
The Hold function is designed to stop conversation temporarily. In off-hook state (or HF function is turned on), to press HD key on the keyboard, the Hold function can be turned "on" (HDO pin switched to "High"). One of the following operations can turn off Hold function (HDO pin switched to "Low").
• On-Off hook once.
• To press HD key back to idle On_Hook state
• Turn on Handfree (HF) function.(HFO pin switched to "High") ** In Hold state all key board will be disable except "HF" , "HD" key and HKS switch
Mute function
­The EM91865 provide mute function to mute microphone or antler at off-hook (or turn on HF) state. When key­in "MUTE" key, "MuteO" pin will become "High" to mute microphone. Any key-in will release mute mode and operating the correct key.
Volume add function
EM91865 provide Volume Add function to control the speech network for adding the receiving volume. Except idle On-Hook state, Volume add function will working effect no matter what state is. Volume add function are
toggle structure. Every time touch VA key will inverter the VAO pin condition ( H→L→H→L→.....). So Volume
add will active or release each time keying VA. If and only if, when dialer back to the idle On_Hook state then the Volume add function will force to release. This solution protect the user will not be hurt by loud volume. Although Volume add state will not change by Off_Hook or HF operation but if dialer are in HF mode then Volume add outpout (VAO) will be inhibited.
Noted : Except dialer back to idle state, any other operate will not reset volume add situation ( include HD,
HF, Flash ..... , and so on ). So volume add situation will be hold until dialer back to idle.
* This specification are subject to be changed without notice.
4.28.1999
7
Page 8
OPERATING FLOW CHART
EM91865
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
Preliminary
Truth Table :
HF
(4)
On_Hook
HF
HD
HD
HF
(6)
On_Hook
HD
<Note> : HF=Handfree
HF
HKS=H
Off_Hook
HD
HD=Hold
(1) On_Hook
state
HKS=H
HKS=L
(3)
HF
HKS=H
HKS=L
HF
HF HF
HKS=L
Off_Hook
Off_Hook
(2)
state
(5)
HD
HD
HD
Operating state Input / Output pin level
HKS PO XMUTE HFO HDO (1)On-hook, idle state H Z L L L (2)Off-hook line L Z L L L (3)Off-hook, HF line L Z L H L (4)On-hook, HF line H Z L H L (5)Off-hook, HD line L Z H L H (6)On-hook, HD line H Z H L H
Note : Z= floating (high impedance) ; H= logic "High" ; L= logic "Low" level.
@ = To doing R-option
* This specification are subject to be changed without notice.
4.28.1999
8
Page 9
EM91865
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
Preliminary
ABSOLUTE MAXIMUM RATINGS(Ambient temperature is 25
o
C, all voltages referenced to VSS)
Items Sym. Rating Unit
Power supply voltage V Input voltage range V Operating temperature T Storage temperature T Power consumption P
DD
IN
OPR
STO
D
VSS-0.3V ~ VDD+0.3V V
6.0 V
0 ~ +70
-55 ~ 150 500 mW
o
C
o
C
RECOMMENDED OPERATING CONDITIONS
1. Supply voltage range from 2 V to 5.5 V at fc=3.58 MHz
2. Operation frequency: 3.58 MHz crystal.
D.C. ELECTRICAL CHARACTERISTICS
(VSS=0V; T
Parameter Sym. Min. Typ. Max. Unit Condition
Operating voltage Tone
Standby current Istby - 0.001 0.1 µA Idle On_Hook state
Operating current Tone
Memory retention current Imrt - 0.001 0.1 uA HKS=1,Vdd=1V HKS , HFI ViH 0.7 - 1 V
Input voltage ViL Vss - 0.3 HFO IoH -0.2 - - mA Vo=2.5V Drive current Sink current IoL 0.2 - - Vo=0.5V HFO pull down resistor Rhf - 200 - K VAO IoH - - -0.01 u A Vxmute=Vdd Leakage current Sink current IoL 1 - - mA Vxmute=0.5V MuteO , HDO , XMUTE IoH -270 -350 -420 uA Vo=2.5V Drive current Sink current IoL 10 20 50 Vo=0.5V K2 , K3 , K6 , K7 , K8 IoH -270 -350 -420 uA Vo=2.5V Output current IoL 10 20 50 Vo=0.5V PO Sink current IoL 1 1.5 2 mA Vo=0.5V
=0oC to 70oC, VDD=3V unless otherwise noted)
OPR
Pulse 2.0 - 5.5 Memory retenion 1.0 - 5.5
Pulse - 0.15 0.3
V
2.0 - 5.5 V unload
DD
- 0.15 0.3 mA
I
DD
- 0.3 0.5 mA
DD
Schmitt trigger
Ω
* This specification are subject to be changed without notice.
4.28.1999
9
Page 10
EM91865
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
Preliminary
DTMF CHARACTERISTICS (V
Symbol Description Min. Typ. Max. Unit
Twist Twist=20 LOG(COL/ROW) 1 2 3 dB DC level Vdc , Vdd=2.0V~5.5V 0.55 - 0.7 V dd Dist Distortion - -30 -23 dB Ac level Row group 130 155 180 mVrms Sink current Vdtmf=0.5V 0.2 - - mA Load resistor Dist<-23dB 5 - - KΩ Minimum tone duration Td ( redial ) - 90 - ms Minimum intertone pause Titp ( redial ) - 90 - ms
ACTUAL FREQUENCY OUTPUT ( fosc =3.579545 Hz )
Standard (Hz ) Output ( Hz ) Deviation ( % )
F1 697 699 +0.28 F2 770 766 -0.52 F3 852 848 -0.47 F4 941 948 +0.74 F5 1209 1216 +0.57 F6 1336 1332 -0.30 F7 1477 1472 -0.34
= 0V , VDD= 3V , Topr = 0oC to 70oC)
SS
ELECTRICAL CHARACTERISTIC
(V
Keyin or release debounce Tdb - 18 - ms Pulse rate PSR - 10 - pps Make/Break ratio MBR - 40:60 - % K2 pin=NR
Inter-digit pause time Tidp - 800 - ms Pause time Tp - 3.6 - S Pulse to tone time Tpt Flash break time Tf - 600 - F1 key
Flash Pause time Tfp - 600 - mS Tone duration Td - 90 - mS One key redial Break time Trb - 1.2 - S One key redial Pause time Trb - 1 - S Scan wave width Tsw - 1/32 - mS Scan wave period Tsp - 0.25 - mS Key board scan Period Tksp - 2.25 - mS Auto Insert Pause Taip 0 - 3100 mS Pre-Mute time Tpm - 5 - mS
=3.0V,Fosc=3.58 MHz)
DD-VSS
Parameter Sym. Min. Typ. Max. Unit Condition
- 33:66 - K2 pin=R-Vss
- 300 - mS F2 key
- 100 - F3 key
* This specification are subject to be changed without notice.
4.28.1999
10
Page 11
EM91865
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
TIMING DIAGRAM
HKS
KEY
XMUTE
DTMF
PO
XOUT
Tdb
Tpm
Preliminary
1
2
Titp
Td
3
HKS
KEY
XMUTE
PO
DTMF
XOUT
Tdb
Tpm
Figure 1. Tone Mode operating Timing
12
Tdb
Tidp Tidp Tidp
tB
3
Figure 2. Pulse Mode operating Timing
* This specification are subject to be changed without notice.
4.28.1999
11
Page 12
EM91865
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
Preliminary
TonePulse
KEY
XMUTE
DTMF
PO
XOUT
KEY
XMUTE
PO
14
2 3*/T
Tpt
Figure 3. Pulse to Tone operating Timing
F 3 dial inhibited
1
Tf Tfp
2
XOUT
KEY
XMUTE
DTMF
PO
XOUT
Figure 4. Flash operating Timing
Tone mode
1P 2 1P2
Tp
Pulse mode
Tp
Figure 5. Pause operating Timing
* This specification are subject to be changed without notice.
4.28.1999
12
Page 13
HKS
EM91865
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
Preliminary
KEY
DTMF
XOUT
HKS
KEY
DTMF
XOUT
0
Taip
Td
Dialing 057797 so LNB=057797 and Taip timng will be store Then Redial will auto insert Taip timing between RD number 0 and 5
RD
Titp
0
Td
577 97
Taip
57797
HKS KEY
XMUTE
PO
XOUT
Figure 6. Auto Insert Time operating Timing
(LNB=1 2 3)
RD
Figure 7. Redail operating Timing ( Pulse Mode )
* This specification are subject to be changed without notice.
4.28.1999
13
Page 14
HKS
EM91865
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
Preliminary
(LNB=1 2 3)
KEY
XMUTE
DTMF
XOUT
HKS KEY
XMUTE
PO
RD
Figure 8. Redial operating Timing ( Tone Mode )
LNB= 1 2
1 2 RD
Trb Trp
XOUT
HKS KEY
XMUTE
PO
DTMF
XOUT
Figure 9. One key Redial operating Timing ( Pulse Mode )
LNB= 1 2
1 2 RD
Trb Trp
Figure 10. One key Redial operating Timing ( Tone Mode )
* This specification are subject to be changed without notice.
4.28.1999
14
Page 15
HFI
HFO
EM91865
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
Preliminary
Tdb
KEY
XMUTE
PO
XOUT
Figure 11. Handfree Mode One key Redial operating Timing ( Pulse Mode )
HFI
HFO
1 2 RD
LNB = 1 2
Torf Trdp
Tdb
KEY
XMUTE
DTMF
PO
XOUT
Figure 12. Handfree Mode One key Redial operating Timing ( Tone Mode )
* This specification are subject to be changed without notice.
1 2 RD
LNB = 1 2
Torf Trdp
4.28.1999
15
Page 16
HKS
HFI
HFO
EM91865
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
Preliminary
Tdb
Tdb
KEY
K1/HDO
XMUTE/K6
K2~K8
XOUT
HKS KEY
MuteO/K4
HF
HD
HF
HD
HD
HD
Tdb
Figure 13. Handfree and Hold operating Timing
1
MUTE
Tdb
2
Tdb
HD HD
Tdb
XMUTE
DTMF
XOUT
Figure 14. Mute operating Timing
* This specification are subject to be changed without notice.
4.28.1999
16
Page 17
EM91865
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
Preliminary
K1
K2
K3
K4
K5
K6
K7
K8
Tsp
Tsw
Tksp
HKS
KEY
K1
K2 ~ K8
Tsp
Tsw
Figure 15. Key board scan Timing
HD
Figure 16. Hold active Key board scan Timing
HD
Tdb
* This specification are subject to be changed without notice.
4.28.1999
17
Page 18
EM91865
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
Preliminary
K1
K2
K3
K4
K5
K6
K7
K8
Tsp
Tsw
Tksp
Figure 17. Mute active Key board scan Timing
K1
K2
K3
K4
K5
K6
K7
K8
Tsp
Tsw
Tksp
Figure 18. XMUTE active key board scan Timing
* This specification are subject to be changed without notice.
4.28.1999
18
Page 19
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
Preliminary
APPLICATION CIRCUIT : CONTROL CIRCUIT
SPEECH
Network
EM91865
AND VOLUME CONTROL FUNCTION
KEYBOARD
10M
DTMF
I_LOOP
SPEAK_Power
10K
1N4148
220K
100K
A92
HFO
1K
470K
1N4148
/VAO
LED
C945
+
100K
16V/1W
3K3
MuteO
1N4148
1u
XMUTE
33K
5V1
470u
K2
K4K6K1
K3
K5
0.1u
K8
K7
+
33K
33K
18
16
15
13
/PO
A42
HFO
1N4148
104
HDO
100K
104
1N4148
14
K8
K317K2
K1/HDO
EM91865B
K71K6/XMUTE2K53K4/MuteO4XIN5XOUT6VSS7VAO8HFI
DTMF
PO
11
HKS12VDD
10
HFO
9
ON-HOOK
HOOK-SW
240K
1N4148
C945
47K
104
47K
470K
470K
Auto Release HOLD Function
Circuit
47K
C945
C945
220K
+
10U
22K
1U
103
+
OFF-HOOK
+
-
TIP
RING
* This specification are subject to be changed without notice.
47K
VDD
100K
1N4148
HF
100K
1N4148
100K
1N4148
104
103
104
3.58M
4.28.1999
19
Page 20
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
AND VOLUME CONTROL FUNCTION
Preliminary
APPLICATION CIRCUIT : KEYBOARD AND R_OPTION
K1
HD
K2
RD
K3
1
SAVE
23
EM91865
K4 K5 K6 K7
K8
45 6
78 9
*/T
M1
0
EM2
M2 M3 M4 M7
#
EM3EM1
MUTE
P
F1
ST
VA
F2
RC
AIP
T/P MBR
F3
M0
M6M5
M9
M8
560K
R_Option
* This specification are subject to be changed without notice.
4.28.1999
20
Loading...
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use