LSI Logic Confidential
15-56
Serial I/O Port
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
IR1 DMA Transmit Status Register (IR_TX_STATUS_REG_ADDR)
IR2 DMA Transmit Status Register (IR2_TX_STATUS_REG_ADDR)
Offset = 0xBF0044 / 0xBF00C4
Read/Write
Default = 0x0000 0000
FLSTS
FIFO Flush Status
19
This bit is set when the flushing of a particular DMA
channel is complete.
Software must reset FLSTS by writing 0.
FLVLB
FIFO B Byte Count
18:10
This field shows the number of bytes currently held in
FIFO B.
FLVLA
FIFO A Byte Count
9:1
This field shows the number of bytes currently held in
FIFO A.
CHST
DMA Channel Status
0
1 = The DMA transfer operation has finished. CHST can
be cleared by writing 1 to it.
IR1 DMA Transmit Address Pointer1 Register (IR_TX_ADDR_PTR1_ADDR)
IR2 DMA Transmit Address Pointer1 Register (IR2_TX_ADDR_PTR1_ADDR)
Offset = 0xBF0048 / 0xBF00C8
Read/Write
Default = 0x0000 0000
31
20
19
18
16
RSVD
FLSTS
FLVLB
15
10
9
1
0
FLVLB
FLVLA
CHST
31
28
27
16
RSVD
ADDR_PTR1
15
0
ADDR_PTR1