LSI Logic Confidential
Host Interface Registers
8-19
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
Host Data Register (16-Bit Mode for LE = 1)
Host Data Register (16-Bit Mode for LE = 0)
Host Data Register (32-Bit Mode)
Host Address Space: 0x2
8.6.4.3
32-Bit Host Mode
In 32-bit Host mode, the two 16-bit registers are combined into a single
32-bit register at address 0x2 (LE has no effect in this case).
When performing a read to a new address, read the 0x2 Host data
register first. Reading this register triggers a 32-bit read, which also loads
the 0x3 Host data register.
When performing a write to a new address in 32-bit mode, the 0x3 data
register should be written last. Writing the 0x3 data register triggers a
32-bit write by combining the data with the 0x2 data register.
Writing the 0x2 Host data register triggers a write in 32-bit host mode;
however, in 16-bit host mode only the host register is updated.
31
16
Host Space Address 0x3: Most Significant 16 Bits of Data
15
0
Host Space Address 0x2: Least Significant 16 Bits of Data
31
16
Host Space Address 0x3: Least Significant 16 Bits of Data
15
0
Host Space Address 0x2: Most Significant 16 Bits of Data
31
0
All 32 Bits of Data Exist at 0x2 for 32-bit Mode
Содержание DMN-8600
Страница 14: ...LSI Logic Confidential xiv Contents Copyright 2001 2002 by LSI Logic Corporation All rights reserved ...
Страница 18: ...LSI Logic Confidential xviii Copyright 2001 2002 by LSI Logic Corporation All rights reserved ...
Страница 64: ...LSI Logic Confidential 7 6 Memory Mapping Copyright 2001 2002 by LSI Logic Corporation All rights reserved ...