SNL320
16-Bit LCD Controller
/2
/4
system clock /2
/8
MUX
(8-bit)
TnC
8-bit
Up-Counter
comparator
Time Out
/256
Pre-scalar
Enable
clear
Auto-reload
Figure-4
9.
DA & Push-Pull
To play out voices, SNL320 contains two different solutions for the user’s
applications, DAC and Push-Pull. The user can choose one of these two solutions in
this design. Only one function can be activated at one time.
9.1 DAC
A 10-bit current type digital-to-analog converter is built-in SNL320. The relationship
between input digital data and output analog current signal is listed in the following
table. Also, the recommended application circuit is illustrated as follows.
Input data
0
1
…
n
…
1024
Typical value of output current (mA)
0
3/1024
n*(3/1024)
3
9.2 Push-Pull
A Push-Pull Direct Drive circuit is built-in SNL330. The maximum resolution of
Push-Pull is 10 bits. Two huge output stage circuits are designed in SNL330. With
this advanced circuit, the chip is capable of driving speaker directly without external
transistors.
Ver: 1.2
11
July 22, 2005
SONIX [ SONIX TECHNOLOGY COMPANY ]
