Rainbow Electronics aP8942A User Manual

Integrated Circuits Inc. aP8942A

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APLUS MAKE YOUR PRODUCTION A-PLUS

VOICE OTP IC

aP8942A – 42sec

APLUS INTEGRATED CIRCUITS INC.

Address:

3 F-10, No. 32, Sec. 1, Chenggung Rd., Taipei,
Taiwan 115, R.O.C.

(115)台北市南港區成功路一段 32號3樓之10.

TEL: [phone]
FAX: [phone]
WEBSITE : http: //www.aplusinc.com.tw

Sales E-mail:

[e-mail]

Support E-mail:

[e-mail]

Ver 2.0 Dec 6, 2006

Integrated Circuits Inc. aP8942A

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FEATURES

• Standard CMOS process.

• Embedded 1M bits EPROM.

• 42 sec Voice Length at 6KHz sampling and 4-bit ADPCM compression.

• Maximum 32 voice groups.

• Combination of voice blocks to extend playback duration.

• 960 table entries are available for voice block combinations.

• User selectable PCM or ADPCM data compression.

• Two triggering modes are available (EPROM programmable options).

- Key Trigger Mode – Combinations of S1 ~ S8 to trigger 32 Voice Groups; SBT

sequential trigger is possible.

- CPU Parallel Trigger Mode – Combinations of S1 ~ S5 with SBT goes HIGH to

strobe start the voice playback.

• Voice Group Trigger Options: Edge / Level; Hold / Un-hold; Retrigger / Non-retrigger.

• Whole Chip Options: Ramp / No-ramp; Output Options; Key / CPU trigger mode.

• 16ms (@ 8KHz sampling rate) Debounce Time for both Key and CPU Trigger Mode.

• RST pin set to HIGH to stop playback at once.

• Two user programmable outputs for STOP pulse, BUSY signal and flashing LED.

• Built-in oscillator to control sampling frequency with an external resistor.

• 2.6V – 5.0V; Wide range single power supply and < 5uA low stand-by current.

• PWM Vout1 and Vout2 drive speaker directly.

• D/A COUT to drive speaker through an external BJT.

• Development System support voice compilation and options selection.

DESCRIPTION

aP8942A high performance Voice OTP is fabricated with Standard CMOS process with embedded
1M bits EPROM. It can store up to 42sec voice message with 4-bit ADPCM compression at 6KHz
sampling rate. 8-bit PCM is also available as user selectable option. Two trigger modes, simple
Key trigger mode and Parallel CPU trigger mode facilitate different user interface. User selectable
triggering and output signal options provide maximum flexibility to various applications. Built-in
resistor controlled oscillator, 8-bit current mode D/A output and PWM direct speaker driving output
minimize the number of external components. PC controlled programmer and developing
software are available.

Ver 2.0 Dec 6, 2006

Integrated Circuits Inc. aP8942A

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Mode

Mode

1 S8 - Trigger pin (input with internal pull

-

down)

S8

OUT1

VOUT1

VOUT2

VSS

OUT2

V33 COUT

2 3 4 5 6 7 8 20

S1 S3 S2 VDD

S4 SBT

RST

S7

OSC

S5

S6 VPP

PIN CONFIGURATIONS

1

19
18
17
16

15

14

13

PIN

Playback

9

10

DIP / SOP 300 MIL

OTP Program

Description

12

11

2 OUT1 OEB Programmable output (I/O pin)
3 VOUT1 - PWM output to drive speaker directly
4 VOUT2 - PWM output to drive speaker directly
5 VSS VSS Power Ground
6 OUT2 IO Programmable output (I/O pin)
7 V33 V33 Power Supply for OTP programming
8 COUT - D/A current output

9 OSC ACLK Oscillator input
10 S5 S5 Trigger pin (input with internal pull-down)
11 S6 S6 Trigger pin (input with internal pull-down)
12 VPP VPP Supply voltage for OTP programming
13 S1 S1 Trigger pin (input with internal pull-down)
14 S2 S2 Trigger pin (input with internal pull-down)
15 VDD VDD Positive Power Supply
16 S3 S3 Trigger (input with internal pull-down)
17 S4 S4 Trigger (input with internal pull-down)
18 SBT PGM Trigger pin (input with internal pull-down)
19 RST DCLK Reset pin (input with internal pull-down)
20 S7 S7 Trigger pin (input with internal pull-down)

Ver 2.0 Dec 6, 2006

Integrated Circuits Inc. aP8942A

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PIN DESCRIPTIONS

S1 ~ S8

Input Trigger Pins:

- S1 to S8 are used to trigger the 32 Voice Groups in Key Mode.

- S1 to S5 together with SBT are used to trigger the 32 Voice Groups in CPU Parallel Mode.

- In OTP Programming Mode, S1 to S7 are used as program enable pins.

SBT

Input Trigger Pin:

- In Key Trigger Mode, this pin is trigger pin to trigger the playback of Voice Groups one by one

sequentially.

- In CPU Parallel Command Mode, this pin is used as address strobe to latch the input from S1 to

S5 and starts the voice playback.

- In OTP Programming Mode, this pin is used as PGM signal.

VDD and V33

Power Supply Pin for normal and programming operation

VSS

Power Ground Pin

VOUT1 and VOUT2

Digital PWM output pins which can drive speaker and buzzer directly for voice playback.

OSC

During voice playback, an external resistor is connected between this pin and the VDD pin to set
the sampling frequency. In OTP Programming Mode, this is the ACLK input signal.

VPP

No connection during voice playback. In OTP Programming Mode, this pin is connected to a
separate 6.5V power supply.

OUT1 and OUT2

- In Key Trigger Mode and CPU Parallel Command Mode, these pins are user programmable pins

for the STOP pulse, BUSY and LED signals.

- During OTP programming, OUT1 serves as OEB while OUT2 serves as data IO.

COUT

Analog 8-bit current mode D/A output for voice playback

RST

Chip reset in playback mode or DCLK pin in OTP programming mode.

Ver 2.0 Dec 6, 2006

Integrated Circuits Inc. aP8942A

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VOICE SECTION COMBINATIONS

Voice files created by the PC base developing system are stored in the built-in EPROM of the
aP8942A chip as a number of fixed length Voice Blocks. Voice Blocks are then selected and
grouped into Voice Groups for playback. Up to 32 Voice Groups are allowed. A Voice Block
Table is used to store the information of combinations of Voice Blocks and then group them
together to form Voice Group.

Chip aP8942A

Memory size 1M bits
Max no. of Voice Block 252
No. of bytes per Voice Block 512
Max. no. of Voice Group 32
No. of Voice Table entries 960
Voice Length (@ 6KHz 4-bit ADPCM) 42 sec

Example of Voice Block Combination

Assume here we have three voice files, they are “How are You?”, Sound Effect and Music. Each
of the voice file is divided into a number of fixed length Voice Block and stored into the memory.

Voice File 1 - “How are You?” is stored in Voice Block B0 to B12.
Voice File 2 - Sound Effect is stored in Voice Block B13 to B15.
Voice File 3 - Music is Voice Block B16 to B40.

Voice Blocks are grouped together using Voice Table to form Voice Group for playback:

Group no. Voice Group contents Voice Table Entries

Group 1 “How are You?” B0 … B12
Group 2 Sound Effect + “How are You?” B13 … B15 + B0 … B12
Group 3 “How are You?” + Music B0 … B12 + B16 … B40
Group 4 Music B16 … B40

Voice Data Compression

Voice File data is stored in the on-chip EPROM as either 4-bit ADPCM or 8-bit PCM format.
Voice data stored as 4-bit ADPCM provides 2:1 data compression which can save 50% of memory
space. On the other hand, voice data are stored as 8-bit PCM format means no data compression is
employed but voice playback quality will be better.

Ver 2.0 Dec 6, 2006

Integrated Circuits Inc. aP8942A

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Programmable Options

In both Key Trigger Mode and CPU Parallel Trigger Mode, user can select different trigger
functions and output signals to be sent out from the pins OUT1 and OUT2.
Options affect all Voice Group playback are called Whole Chip Options. Options only affect the
playback of individual Voice Group are called Group Options.

Whole Chip Options

• Key or CPU Parallel Trigger Mode.

• Ramp-up-down enable or disable:

When COUT is used for playback, Ramp-up-down should be enabled. This function
eliminates the ‘POP’ noise at the beginning and end of voice playback.
When VOUT1 and VOUT2 are used to drive speaker directly, Ramp-up-down should be
disabled.

Fig. 1 Ramp-up-down Enable Fig.2 Ramp-up-down Disable

• Output Options:

This option sets up the three output pins OUT1 and OUT2 to send out different signals
during voice playback. Four settings are allowed:

OUT1 OUT2

Option 1 LED2 LED1
Option 2 LED2 STOP
Option 3 LED2 BUSY

Option 4 STOP BUSY

Note: Stop plus must be set to enable in order to have STOP plus to come out.

Fig. 3 Output waveforms

Ver 2.0 Dec 6, 2006