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ht95r44/ht95r43 i/o type phone 8-bit mcu with dtmf receiver & cpt detector rev. 1.10 1 may 30, 2011 features mcu features mcu operating voltage without cpt detector f sys = 3.58mhz@ 2.2v~5.5v program memory: 4k 16~8k 16 ram data memory: 1152 8 ~ 21128 26 bidirectional i/os with pull-high options 2 nmos output-only lines 4 external interrupt input pins dual 16-bit timers with interrupts timer external input 8-level stack 32768hz system oscillator 32768hz to 3.58mhz frequency-up circuit real time clock function watchdog timer function pfd driver output dtmf generator dtmf receiver power-down and wake-up feature for power-saving operation multiple operating modes: idle mode, sleep mode, green mode and normal mode up to 1.117 s instruction cycle with 3.58mhz sys - tem clock at v dd =2.2v~5.5v bit manipulation instructions table read function 63 powerful instructions all instructions executed in 1 or 2 machine cycles low voltage reset function supported by comprehensive suite of hardware and software tools 64-pin lqfp package cpt detector features operating voltage: 2.5v~5.5v low power consumption cpt band: 305~640hz detection good performance: -8 ~ -39 dbm at v dd =2.5v 0 ~ -27 dbm at v dd =5v general description these phone mcus are a series of 8-bit high perfor- mance, risc architecture microcontroller devices spe- cially designed for telephone applications. device flexibility is enhanced with their internal special features such as power-down and wake-up functions, dtmf generator, dtmf receiver, cpt detector, pfd driver, etc. these features combine to ensure applications re - quire a minimum of external components and therefore reduce overall product costs. having the advantages of low-power consumption, high-performance, i/o flexibility as well as low-cost, these devices have the versatility to suit a wide range of application possibilities such as dtmf mode caller id phone, home security products, deluxe feature phones, cordless phones, fax and answering machines, etc. the call progress tone detector is for auto-dialing sys- tem use. switched capacitor technology is implemented into the devices to obtain good band pass filter perfor- mance characteristics for 305hz to 640hz call progress tones which are dual tone multi-frequency signals. when a cpt signal is detected it generates relative en - velopes for the microcontroller to determine whether to finish different kinds of cpt signal detections such as dial tones, busy tones, ring-back tones and reorder tones. these devices will be ideally suited for phone products that comply with versatile dialer specification require - ments for different areas or countries. these devices are fully supported by the holtek range of fully functional de - velopment and programming tools, providing a means for fast and efficient product development cycles.
selection guide the following table summarises the main features of each device. part no. vdd program memory data memory general i/o timer cpt detector dtmf generator dtmf receiver stack package ht95r43 2.2v~ 5.5v 4k 16 1152 828 16-bit2 8 64lqfp ht95r44 2.2v~ 5.5v 8k 16 2112 828 16-bit2 8 64lqfp block diagram the following block diagram illustrates the dual-chip structure of the devices, where an individual mcu and cpt detec - tor devices are combined into a single package. ht95r43/ht95r44 rev. 1.10 2 may 30, 2011
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pin assignment pin description pad name i/o options description pa0~pa7 i/o pull-high wake-up bidirectional 8-bit input/output port. each individual pin on this port can be configured as a wake-up input by a configuration option. software in- structions determine if the pin is a cmos output or schmitt trigger input. configuration options determine which pins on the port have pull-high re- sistors. pc0, pc5, pc7 i/o pull-high bidirectional input/output port. software instructions determine if the pin is a cmos output or schmitt trigger input. configuration options deter- mine which pins on the port have pull-high resistors. when the multi-function interrupt is enabled an interrupt will be generated when - ever pc0 or pc5 has a falling edge, or pc7 has a rising edge.when in the idle mode such an interrupt will wake up the device. pc1, pc4, pc6 i/o pull-high bidirectional input/output port. software instructions determine if the pin is a cmos output or schmitt trigger input. configuration options deter - mine which pins on the port have pull-high resistors. pc2, pc3 o nmos output structures pd0~pd7 i/o pull-high bidirectional 8-bit input/output port.software instructions determine if the pin is a cmos output or schmitt trigger input. configuration options de - termine which nibble on the port have pull-high resistors. pe0~pe3 i/o pull-high bidirectional 4-bit input/output port.software instructions determine if the pin is a cmos output or schmitt trigger input. configuration options de - termine if all the pins on the port have pull-high resistors. int i external interrupt schmitt trigger input. edge trigger activated on high to low transition. no pull-high resistor. tmr0 i timer/event counter 0 schmitt trigger input . no pull-high resistor. tmr1 i timer/event counter 1 schmitt trigger input . no pull-high resistor. dtmf o dual tone multi frequency output music o cmos output structure programmable frequency divider pin. ht95r43/ht95r44 rev. 1.10 3 may 30, 2011

pad name i/o options description rt/gt i/o tone acquisition time and release time can be set through connection with external resistor and capacitor cmos in/out est o early steering output cmos out vp i operational amplifier non-inverting input vn i operational amplifier inverting input gs o operational amplifier output terminal vref o reference voltage output, normally v dd /2 x1 x2 i o x1 and x2 are connected to an external 32768hz crystal or resonator for the system clock. xc external low pass filter pin used for the frequency up conversion circuit. res i schmitt trigger reset input. active low. vdd positive power supply vss negative power supply, ground. vdd2 dtmf receiver positive power supply vss2 dtmf receiver negative power supply note: each pin on pa can be programmed through a configuration option to have a wake-up function. ht95r43/ht95r44 rev. 1.10 4 may 30, 2011
ht95r43/ht95r44 rev. 1.10 5 may 30, 2011 functional description as these devices contain multiple internal chips, for a detailed functional description, users must refer to the relevant individual datasheets for both the mcu and the cpt detector. the following table shows which individ - ual devices are inside each package. device mcu cpt detector ht95r43 ht95r33 ht9020b ht95r44 ht95r34 ht9020b multi-chip internal devices although most of the functional description material will be located in the individual datasheets, there are some special considerations which need to be taken into ac - count when using multi-chip devices. these points will be mentioned in the hardware and software consider - ation sections. multi-chip hardware considerations as these single-package multi-chip devices are com - posed of an individual mcu and cpt detector chips, using them together requires the user to take care of some special points. absolute maximum ratings the absolute maximum ratings for the two individual chips must be checked for discrepancies and the nec- essary care taken in device handling and usage. power supply examination of the block diagram will reveal that the cpt detector ground and power supply pin, vss4 and vdd4, are not internally connected to the mcu ground and power supply pins, vss and vdd. for this reason these two pins must be connected externally. when calculating the total current consumption of the device, the internal dc specifications of the two inter - nal chips must be consulted and the individual cur - rents added together. when calculating the total current consumption of the device, the internal dc specifications of the two inter - nal chips must be consulted and the individual cur - rents added together. power down and wake up please note that if the mcu is powered down or placed into a low power mode to conserve power, that the cpt detector will continue running and will con - sume a certain amount of power. the cpt detector can of course be powered down by pulling its cpten pin high. functional pins examination of the block diagram will reveal that the cpt detector pins, cpten, cptx1, cptx2, cptenv, cptvref, cptsin, vdd4, vss4, have no internal connection to the mcu pins. for this reason these pins must be controlled and connected exter - nally. multi-chip programming considerations as there are no internal signal connections between the two internal chips there are no real programming con- siderations for these devices. it is only necessary to realise that if the mcu is switched into any of its low power modes or executes the halt instruction by the application program to reduce power consumption, that the cpt detector will continue operating and therefore contribute to the overall power consumption. the cpt detector can only be powered-down manually using its cpten pin.
application circuits dtmf receiver single-ended input application circuit ht95r43/ht95r44 rev. 1.10 6 may 30, 2011 $ $ & * : " # % 0 & 5 ; "
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package information 64-pin lqfp (7mm 7mm) outline dimensions symbol dimensions in inch min. nom. max. a 0.350 0.358 b 0.272 0.280 c 0.350 0.358 d 0.272 0.280 e 0.016 f 0.005 0.009 g 0.053 0.057 h 0.063 i 0.002 0.006 j 0.018 0.030 k 0.004 0.008 07 symbol dimensions in mm min. nom. max. a 8.90 9.10 b 6.90 7.10 c 8.90 9.10 d 6.90 7.10 e 0.40 f 0.13 0.23 g 1.35 1.45 h 1.60 i 0.05 0.15 j 0.45 0.75 k 0.09 0.20 07 ht95r43/ht95r44 rev. 1.10 7 may 30, 2011
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ht95r43/ht95r44 rev. 1.10 8 may 30, 2011 copyright 2011 by holtek semiconductor inc. the information appearing in this data sheet is believed to be accurate at the time of publication. however, holtek as - sumes 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. 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. (shenzhen sales office) 5f, unit a, productivity building, no.5 gaoxin m 2nd road, nanshan district, shenzhen, china 518057 tel: 86-755-8616-9908, 86-755-8616-9308 fax: 86-755-8616-9722 holtek semiconductor (usa), inc. (north america sales office) 46729 fremont blvd., fremont, ca 94538, usa tel: 1-510-252-9880 fax: 1-510-252-9885 http://www.holtek.com

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