YMF754-V ETC, YMF754-V Datasheet - Page 19

• Manufacturer Part Number: YMF754-V
• Description: DS-1E
• Manufacturer: ETC

YMF754
b[7:6] ..........SDMA: Sound Blaster DMA-8 Channel Select
b[10:8] ........SBIRQ: Sound Blaster IRQ Channel Select
b[13:11] ......MPUIRQ: MPU401 IRQ Channel Select
b14..............SIEN: Serialized IRQ enable
These bits select the DMA channel for the Sound Blaster Pro block.
These bits select the interrupt channel for the Sound Blaster Pro block.
When MIEN is set to “1”, these bits select the interrupt channel for the MPU401 block.
Same interrupt channels can be assigned to SBIRQ and MPUIRQ.
DS-1E supports 3 types of interrupt protocols: PCI interrupt (INTA#), Legacy interrupt (IRQs) and
Serialized IRQ. The interrupt protocol is selected with IMOD and SIEN as follows.
The interrupt channels for IRQs and Serialized IRQ are determined by SBIRQ and MPUIRQ,. Only one
protocol can be used at once.
“0”:
“1”:
“2”:
“3”:
“0”:
“1”:
“2”:
“3”:
“4”:
“5” - “7”:
“0”:
“1”:
“2”:
“3”:
“4”:
“5” - “7”:
SIEN
0
0
1
1
DMA ch0
DMA ch1
reserved
DMA ch3
IRQ5
IRQ7
IRQ9
IRQ10
IRQ11
reserved.
IRQ5
IRQ7
IRQ9
IRQ10
IRQ11
reserved
IMOD
0
1
0
1
(default)
(default)
Interrupt protocol
Legacy interrupt (IRQs)
PCI interrupt (INTA#)
Serialized IRQ
reserved
(default)
-19-
(default)
June 28, 1999