Major Chips Description 2-89

2.8.3 Pin Descriptions

Table 2-15 YMF715 Descriptions

Pin name Pins I/O Type Size Function

ISA bus interface: 36 pins
D7-0 8I/O TTL 24mA Data Bus
Al 1-0 12 ITTL 2mA Address Bus
AEN 1ITTL 2mA Address Bus Enable
/IOW 1ISchmitt 4mA Write Enable
/IOR 1ISchmitt 4mA Read Enable
RESET 1ISchmitt 4mA Reset
IRQ3,5,7,9,10,11 6TTTL 12mA Interrupt request
DRQ0,1,3 3TTTL 12mA DMA Request
/DACK0, 1,3 3ITTL 2mA DMA Acknowledge
Analog Input & Output : 24 sins
OUTL 1O- - Left mixed analog output
OUTR 1O- - Right mixed analog output
VREFI 1I- - Voltage reference input
VREFO 1O- - Voltage reference output
AUXIL lI- - Left AUX1 input
AUX1R lI- - Right AUX1 input
AIJX2L lI- - Left AUX2 input
AUX2R 1I- - Right AUX2 input
LINEL 1I- - Left LINE input
LINER 1I- - Right LINE input
MIC 1I- - MIC input
MIN 1I- - Monaural input
TRECL 1- - - Left Treble capacitor
TRECR 1- - - Right Treble-capacitor
SBFLTL 1- - - Left SBDAC filter
SBFLTR 1- - - Right SBDAC filter
SYNSHL 1- - - Left SYNDAC sample / hold capacitor
SYNSHR 1- - - Right SYNDAC sample / hold capacitor
ADFLTL 1- - - Left input filter
ADFLTR 1- - - Right input filter
VOCOL 1O- - Left voice output
VOCOR I O - - Right voice output
VOCIL 1I- - Left voice input
VOCIR 1I- - Right voice input