LSI Logic Confidential
SIO SPI (Serial Peripheral Interface)
15-7
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
be sent out must be aligned in SDRAM, as illustrated in
and
Similarly, in non-DMA mode, in order to “read” an IR datagram, the
processor must read two registers: RPH and RTC. Again, here the DMA
Engine reads both of these registers simultaneously and places the data
in SDRAM according to these tables.
15.2 SIO SPI (Serial Peripheral Interface)
The SPI interface is a generic 3-wire interface suitable for use with the
various types of SPI (for example, Sony and Motorola).
A typical SPI interface application is shown in
, where the SPI
controller is the bus master.
Table 15.2
Alignment of Transmit Data in SDRAM
IR TX Data
Address; Data
Address; Data
Address; Data
Address; Data
1st Chunk
x8000; MSPL[31:24] x8001; MSPL[23:16] x8002;
MSPR[31:24]
x8003;
MSPR[23:16]
2nd Chunk
x8004; MSPL[31:24] x8005; MSPL[23:16] x8006;
MSPR[31:24]
x8007;
MSPR[23:16]
3rd Chunk
x8008; MSPL[31:24] x8009; MSPL[23:16] x800a;
MSPR[31:24]
x800b;
MSPR[23:16]
4th Chunk
x800c; MSPL[31:24] x800d; MSPL[23:16] x800e;
MSPR[31:24]
x800f; MSPR[23:16]
Table 15.3
Alignment of Receive Data in SDRAM
IR RX Data
Address; Data
Address; Data
Address; Data
Address; Data
1st Chunk
x8800; RPH[31:24]
x8801; RPH[23:16]
x8802; RTC[31:24]
x8803; RTC[23:16]
2nd Chunk
x8804; RPH[31:24]
x8805; RPH[23:16]
x8806; RTC[31:24]
x8807; RTC[23:16]
3rd Chunk
x8808; RPH[31:24]
x8809; RPH[23:16]
x880a; RTC[31:24]
x880b; RTC[23:16]
4th Chunk
x880c; RPH[31:24]
x880d; RPH[23:16]
x880e; RTC[31:24]
x880f; RTC[23:16]
Содержание DMN-8600
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