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HT37B70 Datasheet(PDF) 4 Page - Holtek Semiconductor Inc |
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HT37B70 Datasheet(HTML) 4 Page - Holtek Semiconductor Inc |
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4 / 80 page  PadName I/O Configuration Option Function LCH O ¾ Audioleftchanneloutput SP1,SP0 O ¾ PowerAmp.outputpins AUD_IN I ¾ PowerAmp.inputpin VBIAS O ¾ PowerAmp.voltagebiasreferencepin. RES I ¾ Schmitt Triggerresetinput,activelow OSC1 OSC2 I O CrystalorRC OSC1, OSC2 are connected to an external RC network or external crystal, determined by configuration option, for the internal system clock. If the RC system clock option is selected, pin OSC2 can be used to measure the sys- temclockat1/8frequency. Note: 1.EachpinonPA canbeprogrammedthroughaconfigurationoptiontohaveawake-upfunction. 2.Individualpinscanbeselectedtohavepull-highresistors. 3.BecausethetwotimersareusedbyMIDItheexternaltimerpinfunctionsaredisabled. HT37B50,HT37B30 PadName I/O Configuration Option Function VDD ¾ ¾ Positivedigitalpowersupply VDD_DAC ¾ ¾ Positive DAC circuitpowersupply VDD_AMP ¾ ¾ PositivepowerAmp.powersupply VDD_ADC ¾ ¾ PositiveADCcircuitpowersupply VSS ¾ ¾ Negativedigitalpowersupply,ground VSS_DAC ¾ ¾ Negative DAC powersupply,ground VSS_AMP ¾ ¾ NegativeAMPpowersupply,ground VSS_ADC ¾ ¾ NegativeADCpowersupply,ground PA0~PA4 PA5/INT PA6/TMR0 PA7/TMR1 I/O Pull-high Wake-up Bidirectional 8-bit input/output port. Each pin can be configured as a wake-up input by configuration option. Software instructions determine if the pin is a CMOS output or Schmitt Trigger input. Configuration options determine if all pins on this port have pull-high resistors. Pins PA5, PA6 and PA7 are pin-sharedwith INT,TMR0andTMR1,respectively. PB0/AD0~ PB7/AD7 I/O Pull-high Bidirectional 8-bit input/output port. Software instructions determine if the pin is a CMOS output or Schmitt Trigger input. A configuration option determines if all pins on this port have pull-high resistors. Pins PB0 ~ PB7 are pin-shared withAD0andAD7,respectively. PC0/K0~ PC7/K7 I/O Pull-high Bidirectional 8-bit input/output port. Software instructions determine if the pin is a CMOS output or Schmitt Trigger input. A configuration option determines if all pins on this port have pull-high resistors. Pins PC0 ~ PC7 are pin-shared withK0andK7,respectively(K0~K7areCR/Ffunction). PD0/RCOUT PD1/RR PD2/RC PD3/CC PD4~PD7 I/O Pull-high Bi-directional 4-bit I/O port. Software instructions determined the CMOS out- put or Schmitt trigger with a pull-high resistor (determined by pull-high option: by option). Pins PD0~PD3 are pin-shared with CR/F OSC input pins RCOUT, RR, RC and CC. RCOUT, RR, RC and CC control pin for CR/F Function.PinsPD4,PD5,PD6andPD7arenormalIO. RCH O ¾ Audiorightchanneloutput LCH O ¾ Audioleftchanneloutput SP1,SP0 O ¾ PowerAmp.outputpins HT37B90/HT37B70/HT37B50/HT37B30 Rev.1.00 4 June22,2017 |
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