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W741L250 Datasheet(PDF) 3 Page - Winbond |
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W741L250 Datasheet(HTML) 3 Page - Winbond |
3 / 86 page W741L250 Publication Release Date: March 1998 - 3 - Revision A2 • MFP output pin − Output is software selectable as modulating or nonmodulating frequency − Works as frequency output specified by Timer 1 • Built-in 14-bit clock frequency divider circuit • Two built-in 8-bit programmable countdown timers − Timer 0: One of two internal clock frequencies (FOSC/4 or FOSC/1024) can be selected − Timer 1: Offers auto-reload function and one of two internal clock frequencies (FOSC or FOSC/64) can be selected or falling edge of pin RC.0 can be selected (output through MFP pin) • Built-in 18/14-bit watchdog timer selectable for system reset • Powerful instruction set: 116 instructions • 8-level subroutine (include interrupt) nesting • Up to 4 µS instruction cycle (with 1 MHz operating frequency) • Packaged in 64-pin QFP PIN CONFIGURATION 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 52 53 54 55 56 57 58 59 60 61 62 63 64 RD1 RD0 RC3 RC2 RC1 RC0 RB3 RB1 M F P / I N T / R E S X I N O U T V D N N D C C D H 1 D H 2 V D D SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 R E 2 R E 3 V S S N C N C C O M C O M C O M C O M S E G S E G S E G S E G S E G S E G 3 2 1 0 0 1 2 3 4 5 R D D E E R R R 2 3 0 1 S S S E E E G G E G 2 1 0 9 G SEG9 SEG8 SEG7 SEG6 RB0 RA3 RA2 RA 1 RB2 S 2 2 2 1 S E G 3 2 3 V D D 2 V D D X R A 0 1 |
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