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HT36B2 Datasheet(PDF) 16 Page - Holtek Semiconductor Inc |
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HT36B2 Datasheet(HTML) 16 Page - Holtek Semiconductor Inc |
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16 / 39 page  HT36B2 Rev. 1.10 16 March 10, 2005 ger input with or without pull-high resistor (mask option) structures can be reconfigured dynamically under soft- ware control. To function as an input, the corresponding latch of the control register must write a ²1². The pull-high resistance will be exhibited automatically if the pull-high option is selected. The input source also de- pends on the control register. If the control register bit is ²1², input will read the pad state. If the control register bit is ²0², the contents of the latches will move to the internal bus. The latter is possible in ²read-modify-write² instruc- tion. For output function, CMOS is the only configura- tion. These control registers are mapped to locations 13H, 15H, 17H and 19H). After a chip reset, these input/output lines remain at high levels or floating (mask option). Each bit of these in- put/output latches can be set or cleared by the SET [m].i or CLR [m].i (m=12H, 14H, 16H or 18H) instruction. Some instructions first input data and then follow the output operations. For example, the SET [m].i, CLR [m].i, CPL [m] and CPLA [m] instructions read the entire port states into the CPU, execute the defined operations (bit-operation), and then write the results back to the latches or the accumulator. Each line of port A has the capability to wake-up the de- vice. 16 Channel Wavetable Synthesizer Wavetable Function Memory Mapping Special Register for Wavetable Synthesizer RAM B7 B6 B5 B4 B3 B2 B1 B0 20H VM FR ¾¾ CH3 CH2 CH1 CH0 21H BL3 BL2 BL1 BL0 FR11 FR10 FR9 FR8 22H FR7 FR6 FR5 FR4 FR3 FR2 FR1 FR0 23H ST15 ST14 ST13 ST12 ST11 ST10 ST9 ST8 24H ST7 ST6 ST5 ST4 ST3 ST2 ST1 ST0 25H WBS RE14 RE13 RE12 RE11 RE10 RE9 RE8 26H RE7 RE6 RE5 RE4 RE3 RE2 RE1 RE0 27H A_R ¾ VL9 VL8 ENV1 ENV0 VR9 VR8 29H VL7 VL6 VL5 VL4 VL3 VL2 VL1 VL0 2AH VR7 VR6 VR5 VR4 VR3 VR2 VR1 VR0 Wavetable Function Register Table Register Name Register Function B7 B6 B5 B4 B3 B2 B1 B0 20H Channel Number Selection CH3 CH2 CH1 CH0 20H Change Parameter Selection VM FR 21H Block Number Selection BL3 BL2 BL1 BL0 21H Frequency Number Selection FR11 FR10 FR9 FR8 22H FR7 FR6 FR5 FR4 FR3 FR2 FR1 FR0 23H Start Address Selection ST15 ST14 ST13 ST12 ST11 ST10 ST9 ST8 24H ST7 ST6 ST5 ST4 ST3 ST2 ST1 ST0 25H Waveform Format Selection WBS 25H Repeat Number Selection RE14 RE13 RE12 RE11 RE10 RE9 RE8 26H RE7 RE6 RE5 RE4 RE3 RE2 RE1 RE0 27H Envelope Type Selection ENV1 ENV0 27H Attach and Release Selection A_R 27H Left Volume Controller VL9 VL8 29H VL7 VL6 VL5 VL4 VL3 VL2 VL1 VL0 27H Right Volume Controller VR9 VR8 2AH VR7 VR6 VR5 VR4 VR3 VR2 VR1 VR0 |
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