HT1611C Timer with Dialer Interface Patent Number: 84545 (R.O.C.) Patent Pending: 08/214, 079 (U.S.A.) Features · Operating voltage: 1.2V~1.7V · Real time clock with stopwatch · Low operating current: 3mA (typ.) · Built-in dialer interface · Dialing number and conversation time display · 12-hour or 24-hour format · Conversation timer (59 mins and 59 secs max.) · Two-button sequential operation for real time clock setting · 8 or 10-digit LCD display driver; 3V,1/2 bias, 1/3 duty · Uses 32768Hz crystal (8-digit hand-held calculator LCD used for 8-digit applications) Applications · Timers, clocks, watches · Telephone display interface · LCD display drivers · Instrument display General Description 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 TIMER key, the HT1611C can provide a stopwatch function and timer reset/hold functions (for details, refer to the functional 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 5 Block Diagram IN T C O M 1 X 1 X 2 T 1 T im e B a s e C o m m o n C ir c u it C O M 2 C O M 3 T 2 V o lta g e D o u b le r T im e r D I S K S 2 S h ift R e g is te r S 1 V B V C D e c o d e r & M U X S ta te C o n tro l S E G 1 S e g m e n t L a tc h & S e le c t T IM E R 1 2 /2 4 V A S c a n C K T C o n tro l C ir c u it S E G 3 0 H K R T Rev. 1.10 E P N V D D 1 V S S August 17, 2001 HT1611C Pad Assignment 7 X1 8 T2 9 SEG15 X2 SEG16 6 SEG17 S2 SEG18 5 SEG19 HK SEG20 4 SEG21 COM2 SEG22 3 SEG23 SEG30 SEG24 2 SEG25 SEG29 SEG26 1 SEG27 SEG28 50 49 48 47 46 45 44 43 42 41 40 39 38 (0,0) 37 SEG14 36 SEG13 35 SEG12 34 SEG11 33 SEG10 32 SEG9 31 SEG8 30 SEG7 29 SEG6 28 SEG5 27 SEG4 T1 10 INT 11 26 SEG3 TIMER 12 25 SEG2 12/24 13 15 16 17 18 19 20 21 22 23 24 S1 DI SK VSS VA VB VC COM1 COM3 SEG1 VDD 14 Chip size: 122.5 ´ 124.9 (mil)2 * The IC substrate should be connected to VDD in the PCB layout artwork. Pad Coordinates Pad No. X Unit: mil Y Pad No. X Y Pad No. X Y 35.51 1 -55.73 37.50 18 35 55.46 -55.73 30.58 19 -16.79 3.90 -54.72 2 -54.72 36 55.46 42.86 3 -55.73 23.66 20 12.43 -54.72 37 55.46 50.20 4 -55.73 16.77 21 18.40 -54.72 38 37.60 55.02 5 -55.73 9.85 22 31.48 -54.72 39 30.26 55.02 6 -55.73 2.85 23 45.02 -54.72 40 22.91 55.02 55.50 -54.72 41 15.57 55.02 7 -55.73 -4.07 24 8 -55.73 -11.00 25 55.46 -37.96 42 8.22 55.02 9 -55.73 -17.96 26 55.46 -30.58 43 0.88 55.02 10 -55.73 -24.84 27 55.46 -23.24 44 -6.46 55.02 11 -55.73 -31.73 28 55.46 -15.89 45 -13.81 55.02 12 -55.73 -38.65 29 55.46 -8.55 46 -21.15 55.02 13 -55.73 -47.03 30 55.46 -28.50 55.02 -52.02 -54.72 31 55.46 -1.21 6.14 47 14 48 -35.84 55.02 15 -41.35 -54.72 32 55.46 13.48 49 -43.18 55.02 16 -32.86 -54.72 33 55.46 20.83 50 -50.53 55.02 17 -25.97 -54.72 34 55.46 28.17 Rev. 1.10 2 August 17, 2001 HT1611C Pad Description Pad Name I/O Internal Connection SEG1~SEG30 O CMOS OUT LCD segment signal output pads COM1~COM3 O CMOS OUT LCD common signal output pads HK I CMOS IN Pull-high Hook switch detector input Active low S2 I CMOS IN Pull-low Clock adjusting switch Active high X2 O OSCILLATOR 32768Hz crystal oscillator output X1 I OSCILLATOR 32768Hz crystal oscillator input T2 I CMOS IN Pull-high Test pad (connected to VSS for production test) T1 I CMOS IN Pull-high Test pad (connected to VSS for production test) INT O NMOS OUT TIMER I CMOS IN Pull-low Timer reset and start/hold toggle control input pad 12/24 I CMOS IN Pull-low 12-hour or 24-hour format option pad, connected to VDD for 12-hour format S1 I CMOS IN Pull-low Clock setting switch Active high DI I CMOS IN Pull-high Serial data input pad (connected to the dialer) Data should be valid at the falling edge of SK SK I CMOS IN 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 ¾ ¾ Positive power supply VSS ¾ ¾ Negative power supply, ground Description Interrupt output, 2Hz (default) or 16Hz (by mask option) Approximate internal connection circuit C M O S IN P u ll- lo w C M O S IN P u ll- h ig h V N M O S O U T C M O S O U T V D D D D O S C IL L A T O R 1 2 p F Rev. 1.10 3 X 2 X 1 1 0 M W 1 5 p F August 17, 2001 HT1611C Absolute Maximum Ratings Supply Voltage ...........................................-0.3V to 5V Storage Temperature .......................... -50°C to 125°C Input Voltage ................................. VSS-0.3 to VDD+0.3 Operating Temperature ......................... -20°C to 75°C Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² 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 Symbol Parameter fOSC=32768Hz, Ta=25°C Test Conditions VDD Conditions Min. Typ. Max. Unit VDD Operating Voltage ¾ ¾ 1.2 1.5 1.7 V VIL Input Low Voltage 1.2V~1.7V ¾ VSS ¾ 0.2VDD V VIH Input High Voltage 1.2V~1.7V ¾ 0.8VDD ¾ VDD V ISTB Standby Current 1.5V VHK=Floating (or VDD) ¾ 0.1 1 mA IDD Operating Current 1.5V No load ¾ 3 10 mA IOL Output Sink Current of INT 1.5V VO=0.3V 500 1000 ¾ mA tA Data Setup Time 1.5V ¾ 1 ¾ ¾ ms tB Data Hold On Time 1.5V ¾ 2 ¾ ¾ ms tC Inter Digit Time 1.5V ¾ 5 ¾ ¾ ms tDB Debounce Time (HK, S1, S2, TIMER) 1.5V ¾ ¾ 31.25 ¾ ms RHI Pull-high Resistance (HK, DI, SK) 1.5V VIN=0V ¾ 1 ¾ MW RLO Pull-low Resistance (TIMER, S1, S2, 12/24) 1.5V VTIMER=1.5V ¾ 5 ¾ MW fOSC System Frequency 1.5V Crystal=32768Hz ¾ 32768 ¾ Hz Rev. 1.10 4 August 17, 2001 HT1611C Functional Description Operational flow chart Power-on Reset to 00 00 start real time clock Display real time Y Trig. TIMER key? Reset to 00 00 & start timer N HK= "0" ? Keep counting N N Y Trig. TIMER key ? Reset to 00 00 & start timer Y HK= "0" ? N Timer hold Y Trig. TIMER key ? Timer keeps counting, displays timer value Y N N Dialing data input ? > 5 secs ? Y Display dialing number N Y Y Reset to 00 00 & start timer No data in > 10 s ? Trig. TIMER key ? N N Keep counting N Y Y Trig. TIMER key ? HK= "0" ? Y N N Trig. TIMER key ? Y Timer stops, displays total conversation time Y HK= "0" ? N Timer hold Y Over 5 secs ? HK=0 ? Trig. TIMER key ? N N HK=1 > 5 sec? N Y Y N Y HK= "0" ? N Y N "HK= 1" > 5 secs ? Y Rev. 1.10 5 August 17, 2001 HT1611C On-hook & off-hook Real Time 10 25 Timer Mode Off-hook 37 S2 Hour > 5 secs S1 11 S2 Minute < 5 secs and Off-hook S1 26 On-hook Display Timer 5 sec duration 00 00 00 01 00 02 S2 Block A Block B No Data Entry >10 secs Receive Digit(s) 7 On-hook Receive Data 78 780 Block C Note: 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. In 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. TIMER key function The TIMER key is used to start/stop the timer (toggle). In real time mode, it can perform a stopwatch function. 10 11 00 Trig. TIMER LCD display real time 00 00 00 12 00 Trig. TIMER 01 24 Trig. TIMER Timer hold Timer reset and count Trig. TIMER 12 No action for over 5 secs 00 12 (within 5 secs) 00 00 01 24 Timer reset and count 36 Return to real time clock Timer hold In the conversation timer mode, it can reset or hold the timer. 10 11 00 Off-hook LCD display real time (HK=0) Trig. TIMER 00 00 00 12 1234567 Dialing out Timer reset and count 00 00 01 24 Show dialing numbers 01 00 00 01 24 Timer reset and count 00 24 36 On-hook Timer hold 6 (after 10 secs) 24 Trig. TIMER Timer reset and count Rev. 1.10 Dialing finished over 5 secs Return to real time clock August 17, 2001 HT1611C Data & Timing · For instrument or mC application The HT1611C is also capable of displaying BCD data generated from instrument or a mC 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 IC. After all the data is sent to the HT1611C, the SK pin is set low to avoid switching to the timer mode. · 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. D a ta C o d e K e y -In b 3 b 2 b 1 b 0 B la n k 0 0 0 0 1 0 0 0 1 2 0 0 1 0 3 0 0 1 1 4 0 1 0 0 5 0 1 0 1 6 0 1 1 0 7 0 1 1 1 8 1 0 0 0 9 1 0 0 1 0 1 0 1 0 1 1 0 1 1 1 0 0 F 1 0 1 1 P 1 1 1 0 1 1 1 1 * # D is p la y B la n k · Data latch timing tB S K tA D I b 3 b 2 b 1 b 0 b 3 b 2 b 1 b 0 b 1 b 0 tC D ig it 1 Rev. 1.10 D ig it 2 7 D ig it N August 17, 2001 HT1611C Application Circuits For telephone interfacing (with batteries) 8 /1 0 -D ig it L C D C O M 1 C O M S E G 3 1 S E G 3 0 5 0 4 9 4 8 4 7 4 6 4 5 4 4 4 3 4 2 4 1 4 0 3 9 C O M 2 3 7 3 8 3 6 1 3 5 2 3 4 3 3 3 4 3 2 H K S 2 5 6 3 1 H T 1 6 1 1 C 7 3 0 2 9 8 3 2 7 6 8 H z 2 8 9 T IM E R 1 2 /2 4 S 1 1 0 2 7 1 1 2 6 1 2 2 5 1 3 1 4 1 5 1 6 1 7 1 8 D I S K 1 9 2 0 2 1 2 2 2 3 2 4 0 .1 m F 0 .1 m F 1 .5 V 4 7 k W 8 0 5 0 3 3 0 k W H F O D O H K S H F I 2 7 0 k W H D I + 3 .5 8 M H z C L O C K X 1 X 2 V S S H T 9 3 X X X D ia le r V D D H D I 1 N 4 1 4 8 ´ 3 P O 1 0 0 k W 1 0 M W T ip O ff-h o o k O n -h o o k A 9 2 2 2 0 k W 8 0 5 0 1 0 0 k W H F I 0 .0 2 m F 1 A b r id g e R in g 2 .7 k W 4 7 k W 3 3 0 m F 1 0 V 3 3 k W 4 7 k W A 4 2 5 .1 V V S S * The IC substrate should be connected to VDD in the PCB layout artwork. Rev. 1.10 8 August 17, 2001 HT1611C For telephone interfacing (without batteries) 8 /1 0 -D ig it L C D C O M 1 C O M S E G 3 1 S E G 3 0 5 0 4 9 4 8 4 7 4 6 4 5 4 4 4 3 4 2 4 1 4 0 3 9 C O M 2 3 7 3 8 3 6 1 3 5 2 3 4 3 3 3 4 3 2 H K 5 6 3 1 H T 1 6 1 1 C 7 3 0 2 9 8 3 2 7 6 8 H z 2 8 9 T IM E R 1 0 2 7 1 1 2 6 2 5 1 2 1 3 1 4 1 5 1 6 1 7 1 8 D I S K 1 9 2 0 2 1 2 2 2 3 2 4 0 .1 m F 0 .1 m F 3 .5 8 M H z 4 7 k W 8 0 5 0 3 3 0 k W H F O D O C L O C K H K S H F I H D I X 2 V S S H T 9 3 X X X D ia le r V D D H D I 1 N 4 1 4 8 ´ 6 2 2 0 k W 2 7 0 k W 2 0 k W H F I 1 m F 8 0 5 0 X 1 0 .0 2 m F 4 7 k W 3 3 0 m F 1 0 V P O 1 0 0 k W 1 0 M W T ip O ff-h o o k O n -h o o k A 9 2 1 A b r id g e R in g 2 .7 k W 3 3 k W 4 7 k W A 4 2 5 .1 V 1 0 0 k W V S S * The IC substrate should be connected to VDD in the PCB layout artwork. Rev. 1.10 9 August 17, 2001 HT1611C For instrument or mC use 8 /1 0 -D ig it L C D C O M 1 C O M S E G 3 1 S E G 3 0 5 0 4 9 4 8 4 7 4 6 4 5 4 4 4 3 4 2 4 1 4 0 3 9 C O M 2 3 7 3 8 3 6 1 3 5 2 3 4 3 3 3 4 3 2 H K S 2 5 6 3 1 H T 1 6 1 1 C 7 3 0 2 9 8 3 2 7 6 8 H z 2 8 T IM E R 9 1 2 /2 4 1 0 2 7 1 1 2 6 1 2 2 5 S 1 1 3 1 4 1 5 1 6 1 7 1 8 D I S K 1 9 2 0 2 1 2 2 2 3 2 4 0 .1 m F 0 .1 m F + R 5 V R 1 R H K V D D R 1 R 1 D O 1 .5 V R C L O C K In s tru m e n t o r m C S y s te m V S S * The IC substrate should be connected to VDD in the PCB layout artwork. Note: To drive SK, DI, HK, an open drain NMOS output structure is recommended. To drive SK, DI and HK with a CMOS output structure, a voltage divider is needed (R=4.3kW, R1=10kW). Rev. 1.10 10 August 17, 2001 HT1611C LCD Configuration For 8-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 COM 1 3 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 2 LCD driving system 1/2 bias, 1/3 duty, 3V · Common electrode side SEG 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 · LCD connection COM2 COM1 Rev. 1.10 COM3 11 August 17, 2001 HT1611C 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 29 30 3 3 4 5 6 1 1 7 8 9 10 13 14 15 21 26 27 2 11 12 16 17 18 19 20 22 23 24 25 28 2 LCD driving system 1/2 bias, 1/3 duty, 3V · Common electrode side SEG 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 · LCD connection COM1 Rev. 1.10 COM 12 August 17, 2001 HT1611C Holtek Semiconductor Inc. (Headquarters) No.3, Creation Rd. II, Science Park, Hsinchu, Taiwan Tel: 886-3-563-1999 Fax: 886-3-563-1189 http://www.holtek.com.tw Holtek Semiconductor Inc. (Taipei Sales Office) 4F-2, No. 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan Tel: 886-2-2655-7070 Fax: 886-2-2655-7373 Fax: 886-2-2655-7383 (International sales hotline) Holtek Semiconductor Inc. (Shanghai Sales Office) 7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China 200233 Tel: 021-6485-5560 Fax: 021-6485-0313 http://www.holtek.com.cn Holtek Semiconductor Inc. (Shenzhen Sales Office) 43F, SEG Plaza, Shen Nan Zhong Road, Shenzhen, China 518031 Tel: 0755-8346-5589 Fax: 0755-8346-5590 ISDN: 0755-8346-5591 Holtek Semiconductor Inc. (Beijing Sales Office) Suite 1721, Jinyu Tower, A129 West Xuan Wu Men Street, Xicheng District, Beijing, China 100031 Tel: 010-6641-0030, 6641-7751, 6641-7752 Fax: 010-6641-0125 Holmate Semiconductor, Inc. (North America Sales Office) 46712 Fremont Blvd., Fremont, CA 94538 Tel: 510-252-9880 Fax: 510-252-9885 http://www.holmate.com Copyright Ó 2001 by HOLTEK SEMICONDUCTOR INC. 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. Holtek¢s 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 http://www.holtek.com.tw. Rev. 1.10 13 August 17, 2001