APExx24 Series

Rev 1.1 2003/9/2

1.0 General Description

The

APExx24

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 2.4V to 5.5V at 4MHz or 8MHz.

(2) Program ROM: 64k 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 20-bits

VPR can access up to 1024k x 10 bits voice data memory space.

Product

Voice Duration (sec) Voice Pointer (VPR) ROM Size (10-bits)

APE12724 127 19-bits 384k
APE17024 170 19-bits 512k
APE25524 255 20-bits 768k
APE34024 340 20-bits 1024k

(4) Data Registers:

a). 128 x 4-bits data RAM (00-7Fh)

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)

c). PRC: 4-bits I/O Port C (14h) can be programmed to input/output individually. (Register control)

d). PRD: 4-bits I/O Port D (15h) can be programmed to input/output individually. (Register control)

e). PRE: 4-bits I/O Port E (17h) can be programmed to input/output individually. (Register control)

f). PRF: 4-bits I/O Port F (18h) can be programmed to input/output individually. (Register control)

(6) On-chip clock generator: Resistive Clock Drive (RM) or Crystal oscillator (HM)

(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 Control can be configured. (Mask option)

(11) Built-in IR Carry Output: Port B[1] can be configured as IR pin by 38k / 56kHz. (Mask option)

APExx24 Series

Rev 1.1 2003/9/2

(12) External Reset: Port B[3] can be configured as reset pin. (Mask opton)

(13) HALT and Release from HALT function to reduce power consumption

(14) Watch Dog Timer (WDT)

(15) Instruction: 1-cycle instruction except for table read and program branches which are 2-cycles

(16) Number of instruction: 27

(17) DAC: 1 channel voice and dual tone melody synthesizer (One 9-bits Cout or 8-bits PWM output).

FIGURE 1 : ROM Map of

APExx24

Series

16-bit x 2 STACK

Reset Vector

00000h-0FFFFh

16-bit Data Pointer

PC[15:0]

Reserved for Testing

000FFh-00400h
00401h

00000h

000FEh

Program ROM

00000h-0FFFFh

Data ROM for Melody

20-bit Voice Pointer

00000h-FFFFFh

Voice ROM for Voice

APExx24 Series

Rev 1.1 2003/9/2

3.0 Pin Description

Pad Name

Pin Attr.

Description

PWM2/Cout

PWM2 output, or Current Output of Audio.

PWM1

O PWM1

output.

Vdd1~3

Power

Power supply during operation.

PRA0~3
PRC0~3
PRD0~3
PRE0~3

PRF0~3

I/O

I/O port can be programmed to input/output individually.
Input type with weak pull-low or fix-input-floating capability.
Buffer Output type.

PRB0 / OSC2

I/O

I/O port can be configured to input/output individually or HM OSC pad.
Input type with weak pull-low or fix-input-floating capability.
Buffer Output type.

PRB1 / IR

I/O

I/O port can be configured to input/output individually.
Input type with weak pull-low or fix-input-floating capability.
Buffer Output type.
Mask option selected as an IR Carrier Output with 38k / 56kHz

PRB2

I/O

I/O port can be configured to input/output individually.
Input type with weak pull-low or fix-input-floating capability.
Buffer Output type.

PRB3 / Reset

I/O

I/O port can be configured to input/output individually.
Input type with weak pull-low or fix-input-floating capability.
Buffer Output type.
Mask option selected as an external RESET pin with weak pull-low
capability.

OSC1

RM/HM mode Oscillator input

GND1~4

Power

Ground Potential

4.0 DC Characteristics

Symbol

Parameter

Vdd

Min.

Typ.

Max. Unit

Condition

Vdd

Operating voltage

2.4

5.5

depending on Freq.

3 1

Isb Standby

4.5 1

4MHz, RM,

in HALT Mode

3 2

Iop

Supply
current

Operating

4.5 7

4MHz, RM,

IO Floating

3 3

Iih

Input current

(Internal pull low)

4.5 10

Input ports with weak

pull-low

3 -3

Ioh Output-high

current

4.5 -10

3 7

Iol Output-low

current

4.5 19

4MHz, RM

(IO ports)

0.8 ~ 4.8

Cout

DAC output current

(8-level option)

4.5

0.9 ~ 6.5

4MHz, RM

(Full scale)

dF/F Frequency

stability -5 5 %

Fosc(3v- 2.4v)

Fosc (3v)

dF/F

Fosc lot variation

-10

Vdd=3V, Rosc=180k,

4MHz

Электронный компонент: APE34024