st2024c Sitronix Technology Corporation, st2024c Datasheet - Page 30

• Manufacturer Part Number: st2024c
• Description: 24k 8-bit Single Chip Microcontroller
• Manufacturer: Sitronix Technology Corporation

13.2 Tone Generator
The tone frequency is decided by PSGCK and 12-bit
programmable divider (PSG0[11~0]) and (PSG1[11~0])
Please refert
Ver 2.2
Figure12-11.
Frequency of Channel 0 Tone = PSGCK/(1000H-PSG0[11~0])/2
Frequency of Channel 1 Tone = PSGCK/(1000H-PSG1[11~0])/2
PSG0[11~8]
PSG1[11~8]
PSG0[7~0]
PSG1[7~0]
PSGCK
PSGCK
C0EN
C1EN
LOAD
LOAD
FIGURE 13-12:
FIGURE 13-11: Channel0 PSG Tone Counter
C0[11~8]
C1[11~8]
CLOCK
CLOCK
C0[7~0]
C1[7~0]
Enable
Enable
Latch
Latch
12 Bit Auto-reload Up Counter
12 Bit Auto-reload Up Counter
Channel1 PSG Tone Counter
Channel 0
Channel 1
30/54
OUTPUT
OUTPUT
Tone out
Tone out
ST2024C
1/31/08