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MTV212A32 Scheda tecnica(PDF) 8 Page - List of Unclassifed Manufacturers |
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MTV212A32 Scheda tecnica(HTML) 8 Page - List of Unclassifed Manufacturers |
8 / 23 page MYSON TECHNOLOGY MTV212A32 (Rev. 1.2) Revision 1.2 - 8 - 2000/07/04 = 4 → Select AUXRAM bank 0. = 5 → Select AUXRAM bank 1. 4. Extra I/O The extra I/O is a group of I/O pins located in XFR area. Port4 is output mode only. Port5 can be used as both output and input, because Port5's pin is open drain type, user must write Port5's corresponding bit to "1" in input mode. Reg name addr bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 PORT4 38h (w) P42 P41 P40 PORT5 39h (r/w) P56 P55 P54 P53 P52 P51 P50 PORT4 (w) : Port 4 data output value. PORT5 (r/w) : Port 5 data input/output value. 5. PWM DAC Each PWM DAC converter's output pulse width is controlled by an 8-bit register in XFR. The frequency of PWM clk is 47KHz or 94KHz, selected by PWMF. And the total duty cycle step of these DAC outputs is 253 or 256, selected by DIV253. If DIV253=1, writing FDH/FEH/FFH to DAC register generates stable high output. If DIV253=0, the output will pulse low at least once even if the DAC register's content is FFH. Writing 00H to DAC register generates stable low output. Reg name addr bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 DA0 20h (r/w) Pulse width of PWM DAC 0 DA1 21h (r/w) Pulse width of PWM DAC 1 DA2 22h (r/w) Pulse width of PWM DAC 2 DA3 23h (r/w) Pulse width of PWM DAC 3 DA4 24h (r/w) Pulse width of PWM DAC 4 DA5 25h (r/w) Pulse width of PWM DAC 5 DA6 26h (r/w) Pulse width of PWM DAC 6 DA7 27h (r/w) Pulse width of PWM DAC 7 DA8 28h (r/w) Pulse width of PWM DAC 8 DA9 29h (r/w) Pulse width of PWM DAC 9 DA10 2Ah (r/w) Pulse width of PWM DAC 10 DA11 2Bh (r/w) Pulse width of PWM DAC 11 DA12 2Ch (r/w) Pulse width of PWM DAC 12 DA13 2Dh (r/w) Pulse width of PWM DAC 13 DA0-13 (r/w) : The output pulse width control for DA0-13. * All of PWM DAC converters are centered with value 80h after power on. 6. H/V SYNC Processing The H/V SYNC processing block performs the functions of composite signal separation/insertion, SYNC inputs presence check, frequency counting, polarity detection and control, as well as the protection of VBLANK output while VSYNC speed up in high DDC communication clock rate. The present and frequency function block treat any pulse shorter than one OSC period as noise. |
Codice articolo simile - MTV212A32 |
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Descrizione simile - MTV212A32 |
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