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M37160MA Datasheet(PDF) 8 Page - Renesas Technology Corp |
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M37160MA Datasheet(HTML) 8 Page - Renesas Technology Corp |
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8 / 131 page  Rev.1.01 2003.11.13 page 8 of 130 M37160M8/MA/MF-XXXSP/FP,M37160EFSP/FP Notes : Port Pi (i = 0 to 3) has a port Pi direction register that can be used to program each bit for input (“0”) or an output (“1”). The pins programmed as “1” in the direction register are output pins. When pins are programmed as “0,” they are input pins. When pins are programmed as output pins, the output data is written into the port latch and then output. When data is read from the output pins, the data of the port latch, not the output pin level, is read. This allows a previously output value to be read correctly even if the output LOW voltage has risen due to, for example, a directly-driven light emitting diode. The input pins are in the floating state, so the values of the pins can be read. When data is written to the input pin, it is written only into the port latch, while the pin remains in the floating state. ❈ LED drive ports 4 (P24–P27) Pin Name Input/ Functions Output P50/HSYNC Input P5 Input Port P5 is a 2-bit input port. P51/VSYNC Horizonta synchronous signal Input P50 pin is also used as a horizontal synchronous signal input HSYNC for OSD. Vertical synchronous signal Input P51 pin is a vertical synchronous signal input VSYNC for OSD. P52/B, Output P5 output Pins P52–P55 are 4-bit output port. The output structure is CMOS output. P53/G, OSD output output Pins P52–P55 are also used as OSD output pins R, G, B and OUT respectively. The output P54/R, structure is CMOS output. P55/OUT FILT Clock oscillation Input Connect a capacitor between FILT and Vss. filter Table 7.2 PIN DESCRIPTION (continued) |
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