SNC21120
1-CH H.Q. Speech Controller
5. FUNCTION DESCRIPTIONS
5.1
Oscillator
System clock define 2 Mhz, the souce provided by internal R-type ring oscillator or
external resistor ring oscillator. This option is controlled by pin, RCSEL.
RCSEL = 1 using the external R 180Kohm
RCSEL = 0 using the internal R
5.2
ROM
SNC21120 contains a substantial maximum 384K words (10-bit) internal ROM, which
is shared by program and resource data. Program, voice and data are shared within
this same 384K words ROM.
5.3
RAM
SNC21120 contains maximum 128 nibble RAM (128 x 4-bits). The 128 nibble RAM is
divided into eight pages (page 0 to page 7, 16 nibble RAM on each page). In our
programming structure, users can use the instructions, PAGE n (n=0 to 7) to switch
and indicate the RAM page. Besides, users can use direct mode, M0 ~ M15 in the
data transfer type instructions, to access all 16 nibbles of each page.
5.4
Power Down Mode
“End” instruction makes the IC entering into Stop Mode will stop the system clock for
power savings (<3uA @VDD=3V and <6uA @VDD=4.5V.) Any valid data transition
(L H or H L) occurring on any IO pin can be used to start the system clock and
return to normal operating mode.
5.5
Sampling Rate Counter
The unique sampling rate counter is designed in voice channel to be able to play
diverse voices at different sample playing rates. The playing rate can be adaptively set
up among from the wide ranges of 2.5KHz to 20KHz. This architecture yields a
high-quality voice synthesis that sounds very close to its original source when played
through the same amplifier and speaker circuitry.
Ver: 1.0
5
November 08, 2006
SONIX [ SONIX TECHNOLOGY COMPANY ]
