LSI Logic Confidential
SIO Register Descriptions
15-49
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
•
The previous SDRAM buffer has completed.
IDC DMA Receive Address Pointer 4 Register (IDC_RX_ADDR_PTR4_ADDR)
Offset = 0xBE00F4
Read/Write
Default = 0x0FFF FFFF
ADDR_PTR4 Address Pointer 4
[27:0]
In double-buffer mode, this register is loaded with the
contents of ADDR_PTR2 if Go is high and if either of the
following is true:
•
The DMA channel is idle.
•
The previous SDRAM buffer has completed.
15.5.4 SIO IR1 / IR2 Registers
IR1 Transmit Carrier Wave Period Register (IR1_CWP)
IR2 Transmit Carrier Wave Period Register (IR2_CWP)
Offset = 0xBF0000 / 0xBF0080
Read/Write
Default = 0x3FFF0000
CWP
Carrier Wave Period
29:16
This register encodes the period of the IR carrier wave in
units of sysclk cycles. This register allows carrier frequen-
cies as low as 4.58 kHz.
The actual carrier wave period is CWP[13:0] + 1.
31
28
27
16
Reserved
ADDR_PTR4
15
0
ADDR_PTR4
31
30
29
16
RSVD
CWP
15
0
RSVD
Содержание DMN-8600
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