LSI Logic Confidential
SIO Register Descriptions
15-103
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
UART1 DMA Receive Address Pointer3 Register (UART1_RX_ADDR_PTR3_ADDR)
UART2 DMA Receive Address Pointer3 Register (UART2_RX_ADDR_PTR3_ADDR)
Offset = 0xBE0170 / 0xBE01F0
Read/Write
Default = 0x0000 0000
ADDR_PTR3 Address Pointer 3
27:0
This register is updated by hardware during a DMA oper-
ation.
For write channels (transmit), this register indicates the
current value of the write pointer in SDRAM.
For read channels (receive), it indicates the current value
of the read pointer.
In double-buffer mode, this register is loaded with the
contents of ADDR_PTR1 if Go is high and if either of the
following is true:
•
The DMA channel is idle.
•
The previous SDRAM buffer has completed.
UART1 DMA Receive Address Pointer4 (UART1_RX_ADDR_PTR4_ADDR)
UART2 DMA Receive Address Pointer4 (UART2_RX_ADDR_PTR4_ADDR)
Offset = 0xBE0174 / 0xBE01F4
Read/Write
Default = 0x0FFF FFFF
31
28
27
16
RSVD
ADDR_PTR3
15
0
ADDR_PTR3
31
28
27
16
RSVD
ADDR_PTR4
15
0
ADDR_PTR4
Содержание DMN-8600
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