CS8920A View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
'CS8920A' PDF : 144 Pages View PDF
CS8920A
DMA Channel Number (Read/Write)
Address 0374h
DMA channel assignment:
05 = pins DRQ5 and DACK5
06 = pins DRQ6 and DACK6
07 = pins DRQ7 and DACK7
08 = All DRQ pins high-impedance
Address: PacketPage base + 0374h
The DMA Channel register defines the DMA pins selected by the CS8920A. In the typical application, the follow-
ing bus signals are tied to the following pins:
Bus signal
Typical pin connection
DRQ5
DACK5
DRQ5
DACK5
DRQ6
DACK6
DRQ6
DACK6
DRQ7
DACK7
DRQ7
DACK7
After reset, if no EEPROM is found by the CS8920A, the register has 0000 effectively disabling DMA interface. If
an EEPROM is found, the register’s initial value may be set by the EEPROM.
XXXX XXXX XXXX 0000
DS238PP2
79
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