HT1611C Timer with Dialer Interface

Transcription

1 Crystalfontz Crystalfontz Thiscontrolerdatasheetwasdownloadedfrom htp:/ HT1611C Timer with Dialer nterface Features Patent umber: 844 (R.O.C.) Patent Pending: 08/214, 079 (U.S.A.) Operating voltage: 1.2V~1.7V Real time clock with stopwatch Low operating current: 3A (typ.) Dialing number and conversation time display Conversation timer (9 mins and 9 secs max.) 8 or 10-digit LCD display driver; 3V,1/2 bias, 1/3 duty (8-digit hand-held calculator LCD used for 8-digit applications) Built-in dialer interface 12-hour or 24-hour format Two-button sequential operation for real time clock setting Uses 32768Hz crystal Applications Timers, clocks, watches Telephone display interface LCD display drivers nstrument display General Description The HT1611C is a CMOS chip designed for dialer interfaces driving 8 or 10-digit LCDs. Various functions, such as real time clock, dialing number and conversation time display are provided. The real time is displayed by default. When answering a telephone call, the timer is activated to tell users how long the conversation has taken. After the telephone is hung up, the total conversation time is shown for about seconds and then the real time is displayed again. When making a phone call, the HT1611C receives the dialing data from the dialer and displays the phone number from left to right on the LCD. However, if there is no dialing action within 10 seconds, it restarts the timer again. By adding a TMER key, the HT1611C can provide a stopwatch function and timer reset/hold functions (for details, refer to the functional description). Block Diagram : : E A * = A + + EH? K EJ E A H 8 J = C A, K > A H 8 ) 8 * 8 +, D EB J 4 A C E J A H J = J A + J H + J H + EH? K EJ, A H 7 :? = + 6 A C A J = J? D A A? J - / - / ,, 8 Rev August 17, 2001

2 Pad Assignment SEG1 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24 SEG2 SEG26 SEG SEG14 SEG28 SEG29 SEG30 COM2 HK S2 X2 X1 T2 T1 T TMER (0,0) SEG13 SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 SEG SEG4 SEG3 SEG2 12/ SEG1 COM3 COM1 VDD VC VB VA VSS SK D S1 Chip size: (mil) 2 * The C substrate should be connected to VDD in the PCB layout artwork. Pad Coordinates Unit: mil Pad o. X Pad o. X Pad o. X Rev August 17, 2001

3 Pad Description Pad ame /O nternal Connection Description SEG1~SEG30 O CMOS OUT LCD segment signal output pads COM1~COM3 O CMOS OUT LCD common signal output pads HK S2 CMOS Pull-high CMOS Pull-low Hook switch detector input Active low Clock adjusting switch Active high X2 O OSCLLATOR 32768Hz crystal oscillator output X1 OSCLLATOR 32768Hz crystal oscillator input T2 CMOS Pull-high Test pad (connected to VSS for production test) T1 CMOS Pull-high Test pad (connected to VSS for production test) T O MOS OUT nterrupt output, 2Hz (default) or 16Hz (by mask option) TMER 12/24 S1 D CMOS Pull-low CMOS Pull-low CMOS Pull-low CMOS Pull-high Timer reset and start/hold toggle control input pad 12-hour or 24-hour format option pad, connected to VDD for 12-hour format Clock setting switch Active high Serial data input pad (connected to the dialer) Data should be valid at the falling edge of SK SK CMOS Pull-high Clock input pad (connected to the dialer) VA O CMOS OUT Voltage doubler, connected to the external capacitor VB O CMOS OUT Voltage doubler, connected to the external capacitor VC O CMOS OUT Voltage doubler, connected to the external capacitor VDD Positive power supply VSS egative power supply, ground Approximate internal connection circuit K M K D EC D 8,, ,, + 1 ) 6 4 : : 9 F. F. Rev August 17, 2001

4 Absolute Maximum Ratings Supply Voltage...0.3V to V nput Voltage... V SS 0.3 to V DD +0.3 Storage Temperature... 0C to12c Operating Temperature... 20C to7c ote: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. Electrical Characteristics f OSC =32768Hz, Ta=2C Symbol Parameter V DD Test Conditions Conditions Min. Typ. Max. Unit V DD Operating Voltage V V L nput Low Voltage 1.2V~1.7V V SS 0.2V DD V V H nput High Voltage 1.2V~1.7V 0.8V DD V DD V STB Standby Current 1.V V HK =Floating (or V DD ) A DD Operating Current 1.V o load 3 10 A OL Output Sink Current of T 1.V V O =0.3V A t A Data Setup Time 1.V 1 s t B Data Hold On Time 1.V 2 s t C nter Digit Time 1.V s t DB Debounce Time (HK, S1, S2, TMER) 1.V 31.2 ms R H Pull-high Resistance (HK, D,SK) 1.V V =0V 1 M R LO Pull-low Resistance (TMER, S1, S2, 12/24) 1.V V TMER =1.V M f OSC System Frequency 1.V Crystal=32768Hz Hz Rev August 17, 2001

5 Functional Description Operational flow chart Power-on Reset to start real time clock Display real time Trig. TMER key? Reset to start timer HK= 0? Keep counting HK= 0? Trig. TMER key? Timer hold Trig. TMER key? Reset to start timer Timer keeps counting, displays timer value > secs? Dialing data input? Display dialing number Reset to start timer Keep counting Trig. TMER key? Trig. TMER key? HK= 0? Timer stops, displays total conversation time o data in > 10 s? Trig. TMER key? HK= 0? Timer hold HK=0? Trig. TMER key? Over secs? HK=1 >sec? HK= 0? HK= 1 > secs? Rev August 17, 2001

6 On-hook off-hook Real Time Off-hook Timer Mode Hour 11 S2 S1 > secs Display Timer sec duration On-hook S2 Minute 26 S1 < secs and Off-hook Block A S2 Block B Receive Digit(s) o Data Entry >10 secs 7 On-hook 78 Receive Data 780 ote: Block C Block A shows the switches S1 and S2 that are used for setting and selecting. Block B illustrates a timer mode when Off-hook; timer resets and starts to count the conversation time. n Block C, the dialing data is received and displayed on the LCD from left to right after Off-hook. When the entry interval is over 10 seconds, it resets the timer and starts to count. TMER key function The TMER key is used to start/stop the timer (toggle). n real time mode, it can perform a stopwatch function Trig. TMER Trig. TMER Trig. TMER LCD display real time Timer reset and count Timer hold (within secs) Timer reset and count Trig. TMER o action for over secs Timer hold Return to real time clock n the conversation timer mode, it can reset or hold the timer Off-hook Dialing out Dialing finished LCD display real time (HK=0) Timer reset and count Show dialing numbers (after 10 secs) Timer reset and count Trig. TMER Timer reset and count Trig. TMER Timer hold On-hook over secs Return to real time clock Rev August 17, 2001

7 Data Timing For telephone application The HT1611C is designed to display telephone numbers derived from the HT93XXX series telephone dialers. The corresponding data is illustrated in the following table., = J = A A O 1 > > > > * =, E F = O * = For instrument or C application The HT1611C is also capable of displaying BCD data generated from instrument or a C system. The corresponding data and timing is shown in the Data latch timing. Before the data is transmitted to the HT1611C, the HK pin should be pulled-low or continuously kept low. The HT1611C is then ready to receive the data. At the falling edge of the clock the data is shifted in to the C. After all the data is sent to the HT1611C, the SK pin is set low to avoid switching to the timer mode.. 2 Data latch timing J* J), 1 > > > > > > > > > > J+, EC EJ, EC EJ, EC EJ Rev August 17, 2001

8 Application Circuits For telephone interfacing (with batteries), EC EJ +, / - / , , + + : : : : :, E = A H , 1 8,, 2 6 EF 9 9 0, ) BBD D 9 ) > H E@ C A 4 E C ) 8 8 * The C substrate should be connected to VDD in the PCB layout artwork. Rev August 17, 2001

9 For telephone interfacing (without batteries), EC EJ +, / - / , , + + : : : : :, E = A H , 1 8,, 2 6 EF 0, B B D ) ) D ) > H E@ C A 4 E C * The C substrate should be connected to VDD in the PCB layout artwork. Rev August 17, 2001

10 For instrument or C use, EC EJ +, / - / , , + + 8,, 1 JHK A J + HOJA 8 * The C substrate should be connected to VDD in the PCB layout artwork. ote: To drive SK, D, HK, an open drain MOS output structure is recommended. To drive SK, Dand HK with a CMOS output structure, a voltage divider is needed (R=4.3k, R1=10k). Rev August 17, 2001

11 LCD Configuration For 8-digit application Segment electrode side COM 1 COM SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG Common electrode side LCD driving system 1/2 bias, 1/3 duty, 3V SEG SEG SEG SEG SEG SEG SEG SEG COM 30 2 SEG LCD connection COM2 COM1 COM3 Rev August 17, 2001

12 For 10-digit application Segment electrode side COM COM SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG COM Common electrode side LCD driving system 1/2 bias, 1/3 duty, 3V SEG LCD connection COM1 COM Rev August 17, 2001

13 Holtek Semiconductor nc. (Headquarters) o.3, Creation Rd., Science Park, Hsinchu, Taiwan Tel: Fax: Holtek Semiconductor nc. (Taipei Sales Office) 4F-2, o. 3-2, uanqu St., ankang Software Park, Taipei 11, Taiwan Tel: Fax: Fax: (nternational sales hotline) Holtek Semiconductor nc. (Shanghai Sales Office) 7th Floor, Building 2, o.889, i Shan Rd., Shanghai, China Tel: Fax: Holtek Semiconductor nc. (Shenzhen Sales Office) /F, Unit A, Productivity Building, Cross of Science M 3rd Road and Gaoxin M 2nd Road, Science Park, anshan District, Shenzhen, China 1807 Tel: , Fax: Holtek Semiconductor nc. (Beijing Sales Office) Suite 1721, Jinyu Tower, A129 West Xuan Wu Men Street, Xicheng District, Beijing, China Tel: , , Fax: Holtek Semiconductor nc. (Chengdu Sales Office) 709, Building 3, Champagne Plaza, o.97 Dongda Street, Chengdu, Sichuan, China Tel: Fax: Holmate Semiconductor, nc. (orth America Sales Office) Fremont Blvd., Fremont, CA 9438 Tel: Fax: Copyright 2001 by HOLTEK SEMCODUCTOR C. The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holteks products are not authorized for use as critical components in life support devices or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at Rev August 17, 2001