W523SXX Datasheet, PDF(9/14 Page) Winbond – HIGH FIDELITY PowerSpeech-TM

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W523SXX Datasheet, PDF (9/14 Pages) Winbond – HIGH FIDELITY PowerSpeech-TM

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W523SXX (PRELIMINARY)

TG1

(Data)

<1>

<2>

LSB

MSB

01000100

<3>

<4>

TG2

(Clock)

TDEB

T CRD

<1> When TG1 is pulled low, the W523Sxx stops playing voice or executing instruction and waits for data from

the external ÂµC.

<2> If TG1 is debounced OK, the W523Sxx will clear the CPU receiving buffer.

<3> 8-bit data are transferred by TG1 (Data) and TG2 (Clock). LSB is sent firstly.

<4> TG1 returns to high and starts the CPU interrupt service. In this case W523S15 will play the

H51+voice2+T51 sections and the STPA/BUSY pin is pulled high during the playing period.

The TG1 pin, which is pulled high with a 500Kâ¦ resistor, should be kept high during non-transmission

periods to reduce power consumption. The external ÂµC should be connected to the W523Sxx by an

inverted-type output port for better noise immunity. In CPU mode, the W523Sxx stops operating upon

the falling edge of the TG1 pin. For the CPU interface to work normally, TG1F should be disabled.

Thus, one suggestion is that TG1F, TG1R, TG2F, and TG2R should all be disabled in CPU mode. The

master frequency of the external ÂµC, and hence the clock rate of TG1 and TG2, tends to vary among

different vendors and applications.

Note: In CPU mode application, in case the last voice group entry point, 255, is no used, it should be

typed â ENDâ command to avoid abnormal operating.

Instruction Set List

There are two types of instruction in the W523Sxx, unconditional and conditional instructions. The first

types of instructions are executed immediately after they are issued. The second types of instructions

are executed only when the conditions specified in the instruction are satisfied. All the instructions are

listed in the following table. The cycle time for each instruction is 2/Sampling Frequency (Fs). For

example, Fs = 6.0 KHz, the cycle time is 333 ÂµS.

UNCONDITIONAL

CONDITIONAL

JP G

@STS

JP Rn

@STS

LD EN0, value

@STS

LD EN1, value

@STS

LD MODEi, value

LD MODEi, value @STS

LD STOP, value

@STS

LD PAGE, value

@STS

LD Rn, value

@STS

END

@STS

MV Rn, Rm

@STS

INC

@STS

Publication Release Date: Oct 2000

-9-

Revision A5

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