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SNC26250 Datasheet(PDF) 6 Page - SONiX Technology Company

Part # SNC26250
Description  One Channel Speech Controller
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Manufacturer  SONIX [SONiX Technology Company]
Direct Link  http://www.sonix.com.tw
Logo SONIX - SONiX Technology Company

SNC26250 Datasheet(HTML) 6 Page - SONiX Technology Company

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SNC26250
One Channel Speech Controller
Ver: 1.7
October 14, 2009
6
5.3 RAM
SNC26250 contains 128 nibble RAM (128 x 4-bits). The 128 nibble RAM is divided
into two pages (page 0, 64 nibbles ; page1, 16 nibbles RAM).
In our programming
structure, users can use the instructions, PAGE n (n=0 or 1) to switch and indicate the
RAM page. Besides, users can use direct mode, M0 ~ M63 in the data transfer type
instructions, to access first 64 nibbles of page0 and the last 64 nibbles of page1.
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.
5.6 I/O Ports
There are one 4-bit input port P1 and two 4-bit I/O ports P2 and P3. Any I/O can be
individually programmed as either input pull low or output. Any valid data transition
(H
L|L
H) of P1, P2 and P3 can reactivate the chip when it is in power-down stage.
I/O Port Configuration
Note:
(1) Weak N-MOS can serve as pull-low resistor.
(2) The driving/sink current of P2 & P3 is up to 8mA/16mA
Port Data
Port Status
To Internal Data Bus
Read Control
PAD
Weak


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