Datasheet > SN56340

SN56340

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
松翰 - SONIX		控制器
页数	文件大小	规格书
11页	380K
描述
4-Channel Speech Controller

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数据手册

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SN56340 数据手册

SN56085

4-Channel Speech Controller

5. FUNCTION DESCRIPTIONS

5.1. Oscillator

SN56000 series accepts crystal oscillator / ceramic resonator or RC type oscillator

(selected by pin CKSEL) for system clock. The typical circuit diagrams for oscillator

are listed as follows.

VDD

SN56000

15pf

OSC/XIN

CKSEL

XOUT

2MHz

Crystal / Resonator

5.2. ROM

RC Oscillator

SN56085 contains 256K word (10-bit) internal ROM. Program, voices, melodies, data,

and instrument waveforms share the same ROM with the others.

5.3. RAM

SN56000 series contains 128 nibble RAM. The 128 nibble RAM is separated into

eight pages (page 0, page1… page 7). An implicit page indicator is utilized to specify

page address. Eight instructions, PAGE0, PAGE1... PAGE7 can switch the page

indicator. All 16 nibbles of each page can be accessed by direct mode (to specify M0

~ M15 in the data transfer type instructions.)

5.4. Power Down Mode

“End” instruction will let SN56000 series enter power down mode and consumer very

little amount of current. (<2uA @VDD=3V and <5uA @VDD=5V) After SN56085

enters power down mode, any valid data transition (LꢁH or HꢁL) occurring on any

input ports or IO ports (P1, P2, P3 and P6) lead SN56000 series back to normal

operation mode.

5.5. Sampling Rate Counters

4 independent sampling rate counters are dedicated to 4 individual voice channels to

play voices with different playing rates. The playing rate is programmable from 4KHz

to 40KHz. The resolution of sampling period of each sampling rate counter is 0.25 uS.

This feature helps SN56000 series play sounds with accurate pitches in the case of

music instrument synthesis.

Ver: 1.0

March 2,2005

1 2 3 456 7 8...11

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