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UPD753204 Datasheet(PDF) 9 Page - NEC |
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UPD753204 Datasheet(HTML) 9 Page - NEC |
9 / 80 page ![]() 9 µPD753204, 753206, 753208 3.2 Non-Port Pins (1/2) Pin Name Input/Output Alternate Function After Reset I/O Circuit Function TYPE Note 1 TI0 Input P13 Inputs external event pulses to the timer/event Input (B)-C counter. PTO0 Output P20 Timer/event counter output Input E-B PTO1 P21 Timer counter output PTO2 P22/PCL PCL P22/PTO2 Clock output BUZ P23 Optional frequency output (for buzzer output or system clock trimming) SCK Input/Output P01 Serial clock input/output Input (F)-A SO/SB0 P02 Serial data output (F)-B Serial data bus input/output SI/SB1 P03 Serial data input (M)-C Serial data bus input/output INT4 Input P00 Edge detection vectored interrupt input (both Input (B) rising edge and falling edge detection) INT0 Input P10 Input (B)-C KR0 to KR3 Input/Output P60 to P63 Falling edge detection testable input Input (F)-A S12 to S15 Output – Segment signal output Note 2 G-A S16 to S19 Output P93 to P90 Segment signal output Input H S20 to S23 Output P83 to P80 Segment signal output Input H COM0 to COM3 Output – Common signal output Note 2 G-B VLC0 to VLC2 – – LCD drive power – – On-chip split resistor is enable (mask option). BIAS Output – Output for external split resistor disconnect Note 3 – LCDCL Note 4 Input/Output P30 Clock output for externally expanded driver Input E-B SYNC Note 4 Input/Output P31 Clock output for externally expanded driver sync Input E-B Notes 1. Characters in parentheses indicate the Schmitt trigger input. 2. Each display output selects the following VLCX as input source. S12 to S15: VLC1, COM0 to COM2: VLC2, COM3: VLC0. 3. When a split resistor is contained ....... Low level When no split resistor is contained ...... High-impedance 4. These pins are provided for future system expansion. At present, these pins are used only as pins P30 and P31. Edge detection vectored With clock elimination interrupt input (detection circuit/asynchronous edge can be selected). selectable Noise elimination circuit can be specified. |
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