SNC114
One Channel Direct Drive Speech Controller
5
FUNCTION DESCRIPTIONS
5.1. Oscillator
SNC114 accepts RC type oscillator for system clock. The typical circuit diagram for
oscillator is listed as follows.
VCC
RC Oscillator
5.2. ROM
SNC114 contains substantial 64K word (10-bit) internal ROM. Program, voices and
other data are shared with this same 64K word ROM.
5.3. RAM
SNC114 contains 64 nibble RAM. The 64 nibble RAM is divided into four pages (page
0 to page 3, 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 3) 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 will power down SNC114 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 SNC114, any valid data transition (L H or H L)
occurring on any input port (P1) or IO ports (P2 and P3) will lead SNC114 back to
normal operation 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 feature makes voice
close to its original source and yield the better voice quality.
Ver: 1.3
3
r
June 8, 2005
OSC
SONIX [ SONIX TECHNOLOGY COMPANY ]
