Acer TM7100 Series Service Manual page 100

Table 2-4 NMA1 Pin Descriptions
Pin name
ADFLTR
VOCOL
VOCOR
VOCIL
VOCIR
Miscellaneous pins: 14 pins
SYEN
SYCS
SYCLK
SYLR
SYIN
SYCLKO
RSVD
Others: 27 pins
RXD
TXD
/VOLUP
/VOLDW
X33I
X33O
X24I
X24O
AVDD
DVDD
AVSS
DVSS
Number I/O
1
1 O
1 O
1 I
1 I
1 I
1 O
1 I
1 I
1 I
1 O
8
1 I+
1 O
1 I+
1 I+
1 I
1 O
1 I
1 O
2
3
2
7
Right input filter
Left voice output
Right voice output
Left voice input
Right voice input
External synthesizer enable input
External synthesizer chip select output
External synthesizer clock input or ZV clock input
External synthesizer L/R clock input or ZV L/R clock input
External synthesizer data input or ZV data input
External synthesizer master clock output
Reserved for future use
MIDI Data Receive
MIDI Data Transfer
Hardware Volume(Up)
Hardware Volume(Down)
33.8688MHZ
33.8688MHZ
24.576MHZ
24.576MHZ
Analog Power Supply(put on +5.0V)
Digital Power Supply(put on +5.0V or +3.3V)
Analog GND
Digital GND
Description