ST2202 datasheet(33/65 Pages) ETC

Part #	ST2202

Description	8 BIT Integrated Microcontroller with 256K Bytes ROM

PDF	65 Pages

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Manufacturer	ETC [List of Unclassifed Manufacturers]

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33 / 65 page

Sitronix

ST2202

Ver 2.0a

33/65

2003-May-05

14.2 Tone Generator

14.2.1 General Description

The tone frequency is decided by PSGCK and 12-bit programmable divider (PSG[11~0]). Please refer to FIGURE 14-3

and.FIGURE 14-4.

12 Bit Auto-reload Up Counter

Tone out

OUTPUT

PSG0[11~8]

PSG0[7~0]

LOAD

C0EN

PSGCK

C0[11~8]

C0[7~0]

Latch

Enable

Frequency of Channel 0 Tone = PSGCK/(1000H-PSG0[11~0])/2

CLOCK

Channel 0

FIGURE 14-3 Tone Generator Channel 0

12 Bit Auto-reload Up Counter

Tone out

OUTPUT

PSG1[11~8]

PSG1[7~0]

LOAD

C1EN

PSGCK

C1[11~8]

C1[7~0]

Latch

Enable

Frequency of Channel 1 Tone = PSGCK/(1000H-PSG1[11~0])/2

CLOCK

Channel 1

FIGURE 14-4 Tone Generator Channel 1

14.2.2 PSG Tone Programming

Setting PSG control bit DACE (PSGC[0]) will make PSG

block functions as a sound generator of 2 channels. Setting

C1EN will enable tone generator when PSG is in tone

function. Noise or tone function is selected by PRBS.

ST2202 Datasheet(PDF) 33 Page - List of Unclassifed Manufacturers

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