2-42 Service GuideTable 2-4NMA1 Pin Descriptions
Pin name Number I/O Description
ADFLTR 1Right input filter
VOCOL 1OLeft voice output
VOCOR 1ORight voice output
VOCIL 1ILeft voice input
VOCIR 1IRight voice input
Miscellaneous pins: 14 pins
SYEN 1IExternal synthesizer enable input
SYCS 1OExternal synthesizer chip select output
SYCLK 1IExternal synthesizer clock input or ZV clock input
SYLR 1IExternal synthesizer L/R clock input or ZV L/R clock input
SYIN 1IExternal synthesizer data input or ZV data input
SYCLKO 1OExternal synthesizer master clock output
RSVD 8Reserved for future use
Others: 27 pins
RXD 1I+ MIDI Data Receive
TXD 1OMIDI Data Transfer
/VOLUP 1I+ Hardware Volume(Up)
/VOLDW 1I+ Hardware Volume(Down)
X33I 1I33.8688MHZ
X33O 1O33.8688MHZ
X24I 1I24.576MHZ
X24O 1O24.576MHZ
AVDD 2Analog Power Supply(put on +5.0V)
DVDD 3Digital Power Supply(put on +5.0V or +3.3V)
AVSS 2Analog GND
DVSS 7Digital GND