st2032a Sitronix Technology Corporation, st2032a Datasheet - Page 27

• Manufacturer Part Number: st2032a
• Description: 8 Bit Microcontroller With 32k Bytes Rom
• Manufacturer: Sitronix Technology Corporation

13.3 Noise Generator Control
13.3.1 General description
Noise generator is shown in FIGURE 13-5, which base
13.3.2 Noise Generator Programming
DACE defines noise or DAC function. Writing a “ 1” to C1EN will enable noise generator when PSG is in noise mode.
13.4 PSG Applicaion Circuit
Sounds of two channels are modulated by PSGCK and
combine together into one AC signal. Then it outputs on
Ver 2.4
PSG1[5~0]
PSGCK
C1N[5~0]
CLOCK
Noise Prescaler
NCK Frequency = PSGCK/(40H-PCH1[5~0])
OUTPUT
S T2032A
FIGURE 13-6 PSG Application Circuit
P S G O B
FIGURE 13-5 Noise Generator
P S G O
NCK
27/54
CLOCK
frequency is controlled by PSG1[5~0].
PSGO and PSGOB. Positive part of the AC signal is output
from PSGO while the negative part is from PSGOB.
16-Stage White Noise Generator
Buzze r
OUTPUT
Noise out
ST2032A
9/13/07