AM4EC Datasheet | Alpha

Description The AM4EC series are very low cost voice and melody synthesizer with 4-bits CPU. They have various features including 4-bits ALU, ROM, RAM, I/O ports, timers, clock generator, voice and melody synthesizer, and PWM (Direct drive) or D/A current outputs, etc. The audio synthesizer contains one voice-channel and two melody-channels. Furthermore, they consist of 27 instructions in these devices. With CMOS technology and halt function can minimize power dissipation. Their architectures are similar to RISC, with two stages of instruction pipeline. They allow all instructions to be executed in a single cycle, except for program branches and data table read instructions (which need two instruction cycles). 2.0 Features (1) Single power supply can operate from 2.2~5.5V at 4MHz or 3.6~5.5V at 8MHz. (2) Program ROM: 16k x 10 bits (3) 1 set of 16-bits DPR can access up to 64k x 10 bits melody data memory space, and 1 set of 18-bits VPR can access up to 256k x 10 bits voice data memory space. Product AM4EC005x AM4EC010x AM4EC015x AM4EC020x AM4EC031x AM4EC041x AM4EC052x AM4EC063x (4) Data Registers: a). 128 x 4-bits data RAM (00-7Fh) (4EC005x/4EC010x are 96 x 4-bits data RAM 00-5Fh) b). Unbanked special function registers (SFR) range: 00h-2Fh (5) I/O Ports: a). PRA: 4-bits I/O Port A (10h) can be programmed to input/output individually. (Register control) b). PRB: 4-bits I/O Port B (13h) can be configured to input/output individually. (Mask option) (6) On-chip clock generator: Resistive Clock Drive (RM) (7) Timer: 1-set Voice Interrupt (Timer0: a 9-bits auto-reload timer/counter). (8) Stack: 2-level subroutine nesting. (9) Built-in 4-level Volume Control can be programmed. (10) Built-in 8-level DAC current output can be configured. (Mask option) (11) Built-in IR Carrier Output: Port B[1] can be configured as IR pin by 38k / 56k Hz. (Mask option) 1 Rev 1.6 2004/7/1 Voice Duration (sec) Voice Pointer (VPR) ROM Size (10-bit) 5 10 15 20 31 41 52 63 14-bits 15-bits...