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APU429 Datasheet(PDF) 1 Page - Aplus Intergrated Circuits |
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APU429 Datasheet(HTML) 1 Page - Aplus Intergrated Circuits |
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1 / 18 page ![]() 4-Bit Micro-controller With LCD Driver Features Low power and low voltage operation Powerful instruction set (150 instructions) Memory capacity Instruction ROM capacity 4096 x 16 bits Index ROM capacity 256 x 8 bits Internal RAM capacity 384 or 256 x 4 bits Input/Output ports of up to 20 pins 8-level subroutine nesting Built-in LCD driver, 8 x 42 = 336 segments Built-in EL driver, frequency or melody generator Built-in Resistance-to-Frequency Converter Built-in 2-channel 6/8-bit PWM output Built-in key strobe function (Shared with segment pin) Built-in voltage doubler, halver, tripler quadrupler charge pump circuit Two 6-bit programmable timers with programmable clock source Watchdog timer 4 external & 3 internal interrupt resources External: INT, RFC, IOA/IOC/S port, keystrobe Internal: TM1, TM2, Predivider Dual clock operation HALT and STOP function General Description The APU429 is an embedded high performance 4-bit micro-computer with an on-chip LCD driver. It contains all the necessary functions in a single chip: 4-bit parallel processing ALU, ROM, RAM, I/O ports, timer, clock generator, dual clock, RFC, EL-light, LCD driver, look-up table, watchdog timer and keyboard scanning. The instruction set includes not only 4-bit operation and manipulation instructions but also various conditional branch instructions and LCD driver data transfer instructions which are powerful and easy to use. The HALT function stops any internal operations other than the oscillator, divider and LCD driver in order to minimize the power dissipation. The STOP function stops all the clocks in the chip. Block Diagram Preliminary 1 Ver. 0.0 LC D D river CO M 1 8 S E G 1 S E G 2 6 VD D 1 4 S e gm e n tP L A 4-B it D ata B u s SR A M 12 8 x 4 AL U 2x 6 B its P reset T ime r In stru ctio n De co d e r Co n tro l Circu it Ma sk R O M 40 9 6 x 1 6 8-Leve ls S tack CUP 1 CUP 2 12 -B itP ro gram Co u n te r Ta b le R O M 25 6 x 8 F req ue ncy Ge n e ra to r Pre -D ivid e r W a tchd og Tim e r O scilla to r Inde x S R A M 25 6 x 4 CUP 3 S1 S 4 IO D P o rt /P W M S E G 2 7 30 IO C P o rt /K E Y IN S E G 3 9 42 IO B P o rt /E L , B Z S E G 3 1 34 IO A P o rt /R F C S E G 3 5 38 |
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