SNC209S データシートの表示（PDF） - Sonix Technology Co., Ltd

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SNC209S

Direct Drive Speech Controller

Sonix Technology Co., Ltd 

SNC209S

Direct Drive Speech Controller

5. FUNCTION DESCRIPTIONS

5.1. Oscillator

SNC209S accept RC type oscillator for system clock. The typical circuit diagram for

oscillator is listed as follow.

OSC

VCC

RC Oscillator

5.2. ROM

SNC209S contains substantial 184K words (10-bit) internal ROM. Program, voices

and other data are shared with this same 184K words ROM.

5.3. RAM

SNC209S contains 48 nibbles RAM. The 48 nibbles RAM are divided into three pages

(page 0, page 1 and page 2, 16 nibble RAM on each page). In our programming

structure, users can easily define and locate RAM page in the program. For instance,

users can use the instructions, PAGEn (n=0 to 2) to switch and indicate the RAM page.

Besides, users can use direct mode, M0 ~ M15 in the data transfer type instructions

(M15 is forbidden using for user in each page), to access all 16 nibbles of each page.

5.4. Power Down Mode

“End” instruction will power down SNC208 and enable IC to consume fewer current for

power saving. (<3uA @VDD=3V and <5uA @VDD=5V) Please be aware that when

the power down mode is activated in SNC208, any valid data transition (L H or H L)

occurring on any IO pins of P3 and P2 will lead SNC208 back to normal operation

mode.

5.5. Sampling Rate Counters

The playing rate can be adaptively set up among from the wide ranges of 2.5KHz to

20KHz. This feature makes voice close to its original source and yield the better voice

quality.

Ver: 0.3

4

Sept 20, 2007

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