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HT37Q50 Datasheet(PDF) 10 Page - Holtek Semiconductor Inc |
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HT37Q50 Datasheet(HTML) 10 Page - Holtek Semiconductor Inc |
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10 / 82 page  HT37Q30 Pad Name I/O Configuration Option Function VDD ¾¾ Positive digital power supply VDD_DAC ¾¾ Positive DAC circuit power supply VDD_AMP ¾¾ Positive power Amp. power supply VSS ¾¾ Negative digital power supply, ground VSS_DAC ¾¾ Negative DAC power supply, ground VSS_AMP ¾¾ Negative AMP power supply, 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-shared with INT, TMR0 and TMR1, 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 with K0 and K7, respectively (K0~K7 are CR/F function). PD0/RCOUT PD1/RR PD2/RC PD3/CC 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. RCH O ¾ Audio right channel output SP1, SP0 O ¾ Power Amp. output pins AUD_IN I ¾ Power Amp. input pin VBIAS O ¾ Power Amp. voltage bias reference pin. RES I ¾ Schmitt Trigger reset input, active low OSC1, OSC2 I O Crystal or RC 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- tem clock at 1/8 frequency. NC ¾¾ No connection Note: 1. Each pin on PA can be programmed through a configuration option to have a wake-up function. 2. Individual pins can be selected to have pull-high resistors. 3. Because the two timers are used by MIDI the external timer pin functions are disabled. HT37Q70/60/50/40/30/20 Rev. 1.00 10 February 17, 2009 |
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