LSI Logic Confidential
SIO Register Descriptions
15-63
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
Note:
The maximum size for each SDRAM buffer transfer is 511
bytes. Therefore, the difference between ADDR_PTR2 and
ADDR_PTR1 should not exceed 511.
15.5.5 SIO SPI Registers
SPI Configuration Register (SPI_CONFIG)
Offset = 0xBE0000
Read/Write
Default = 0x0000 0000
BBMD
Bang Mode Enabled
31
1 = The low-frequency bit-bang mode is enabled. When
in this mode, all SPI signal lines are mapped to bytes in
the SPI_TEMP register.
For each byte time, the value of byte [n] in the SPI_TEMP
register is held static and the bits are mapped to the SPI
signal lines as shown in
31
30
24
23
22
21
18
17
16
BBMD
SPED[6:0]
HUEN
OIN
CSPL[3:0]
CPOL
CPHA
15
14
13
10
9
8
7
6
4
3
0
ODW
ODR
IBBK[3:0]
CSBK IBBM
LSBF
CSDL[2:0]
CSSL[3:0]
Table 15.7
Bit-bang Mode Bit to SPI Signal Mapping
Byte/Bit
Signal
In/Out
BYTE[n].7
Don’t Care
N/A
BYTE[n].6
SIO_SPI_CS[3]
Out
BYTE[n].5
SIO_SPI_CS[2]
Out
BYTE[n].4
SIO_SPI_CS[1]
Out
BYTE[n].3
SIO_SPI_CS[0]
Out
BYTE[n].2
SIO_SPI_CLK
Out
BYTE[n].1
SIO_SPI_MOSI
Out
BYTE[n].0
SIO_SPI_MISO
In
Содержание DMN-8600
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