Table 58 - DMA Channel Select Configuration Register Description
NAME
REG INDEX
DEFINITION
STATE
DMA Channel
Select
0x74 (R/W)
Bits[2:0] select the DMA Channel.
0x00= Reserved
C
0x01= DMA1
0x02= DMA2
0x03= DMA3
0x04-0x07= No DMA active
Default = 0x04
on Vcc POR or
Reset_Drv
Note:
Note:
A DMA channel is activated by setting the DMA Channel Select register to [0x01-0x03] AND :
for the FDC logical device by setting DMAEN, bit D3 of the Digital Output Register.
for the PP logical device in ECP mode by setting dmaEn, bit D3 of the ecr.
DMAREQ pins must tri-state if not used/selected by any Logical Device. Refer to Note A.
135
SMSC [ SMSC CORPORATION ]
