sh6613 SinoWealth Micro-Electronics Corp. Ltd, sh6613 Datasheet - Page 11

• Manufacturer Part Number: sh6613
• Description: 4k 4-bit Microcontroller With Lcd Driver
• Manufacturer: SinoWealth Micro-Electronics Corp. Ltd

Mixer
The MIXER mixes CH1-OUT and CH2-OUT into one tone output to PA.1 、 PA.2, when PAM1=1 、 PAM2=1. Then the tone
output is controlled by the volume control bit into 4 volume levels and in the end outputted by PSG.
PA.1 & PA.2 are controlled by PAM1 & PAM2
Note: Don’t enable two PSG channels together to produce one tone, or it will produce some unpredicted errors. If it is necessary
to use 2 channels together (EX. To play two channel melody), don’t let the score always be the same tones as we can do, then
the unpredicted errors will not occur or it will be ignore through user hearing.
SEL1
0
0
1
1
PAM2
0
0
1
1
SEL0
0
1
0
1
CH1 OUT
CH2 OUT
Vol. control
PAM1
0
1
0
1
YES
YES
YES
NO
TIME SLOT
TIME SLOT
PA.1:I/O PORT
PA.1:PSG output
PA.1:I/O PORT
PA.1:PSG output
VOL0
CONTROL
11/33
VOL
VOL1
PA.2:I/O PORT
PA.2: PSG output
PA.2:I/O PORT
PA.2: PSG output
PA.1 I/O
PA.2 I/O
PSG
PSG
VOL1
Function
0
0
1
1
SELECTOR1
SELECTOR2
PAM1
PAM2
VOL0
0
1
0
1
PA.1
PA.2
Vol. Level
SH6613/B/C
1
2
3
4
V1.2