sh6614 SinoWealth Micro-Electronics Corp. Ltd, sh6614 Datasheet - Page 14

• Manufacturer Part Number: sh6614
• 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: The user should not enable two PSG channels together to produce one tone, otherwise it will produce some
unpredictable errors. If it is necessary to use 2 channels together (ie: to play two channel melody), do not allow score always be
the same tones, then the unpredicted errors will not occur or it will be ignored by user.
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
VOL1
VOL0
0
0
1
1
CONTROL
VOL
14
Function
VOL1
PA.2: I/O PORT
PA.2: I/O PORT
PA.2: PSG output
PA.2: PSG output
VOL0
PA.1 I/O
PA.2 I/O
0
1
0
1
PSG
PSG
Vol. Level
SELECTOR1
SELECTOR2
PAM1
PAM2
1
2
3
4
PA.1
PA.2
SH6614/B/C