sh6614d SinoWealth Micro-Electronics Corp. Ltd, sh6614d Datasheet - Page 12

• Manufacturer Part Number: sh6614d
• Description: 4k 4-bit Microcontroller With Lcd Driver
• Manufacturer: SinoWealth Micro-Electronics Corp. Ltd

8. Programmable sound generator (PSG)
PSG has channel1 and channel2. The function block diagram is shown as follows:
The PSG function provides four subfunctions for wide applications.
Programmable sound
Program sound is created by two channels. Every channel can be programmed as follows:
Fine noise
PSG can provide wide-band noise.
The wide-band noise volume can be controlled at 4 volume levels.
Alarm
PSG can provide many alarm functions by the software.
The alarm carrier frequency can be programmed individually.
The alarm volume can be controlled at 4 volume levels.
Remote control
The remote control is the only expandable application for PSG sound. Since the remote control frequency is 56.13KHz or
37.92KHz, the software can select the sound frequency.
8.1. PSG subblock diagram
MPX block diagram
The MPX block selects 4 clock sources as PSG clk that provides the two channel clk sources.
- Enable/Disable every channel sounds.
- Select every channel sound frequency.
- Two channel sounds are mixed into one PSG output.
- The PSG output can be controlled at 4 volume levels.
SEL1
0
0
1
1
SEL0
0
1
0
1
Clk source
OSCX/16
OSC/2
OSCX
OSC
OSCX
OSC
OSCX
OSC
MPX
/16
/2
OSC = 32.768K
OSC = 32.768K
OSCX = 1.8M
OSCX = 455K
OSCX = 1.8M
OSCX = 455K
OSC = 262K
OSC = 262K
CHANNEL1
CHANNEL2
OSC clk
SEL0
CLK-SLECTOR
12
SEL1
CH1 CLK
CH2 CLK
MIXER
PSG CLK
PSG clk
32.768K
16.384K
112.5K
28.4K
262K
131K
455K
1.8M
PSG
PSG
SH6614D