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P5040/P5020 Reference Design Board User Guide, Rev. 0
Freescale Semiconductor
57
Programming Model
7.1.10
Board Configuration Register (PX_BRDCFG1)
This register controls board configurations; they can be changed at any time.
Figure 31. Board Configuration Register 1 (PX_BRDCFG1)
Table 37. FLASHCS_SEL
FLASHCS_SEL1
FLASHCS_SEL0
SPI_CS_SEL
Description
0
0
SPI_CS0
SPI FLASH S25FL129P0XNFI001
operates when CVDD = 3.3V.
0
1
SPI_CS1
1
0
NC
1
1
0
1
2
3
4
5
6
7
R
—
—
EMI1_SEL1
EMI1_SEL0
EMI1_SEL_E
N
—
—
SPI_I
2
C_SEL
W
Reset
0
0
0
0
1
0
0
1
Offset
0x09
Table 38. PX_BRDCFG1 Field Descriptions
1
1
See reg_BRDCFG2[1:2] for extra control signals.
Bits
Name
Description
0
—
Reserved.
1
—
Reserved.
2
EMI1_SEL1
Controls connection to EMI1 bus as per EMI1_SEL0 and EMI1_SEL1.
See
.
3
EMI1_SEL0
Controls connection to EMI1 Bus as per EMI1_SEL0 and EMI1_SEL1.
See
.
4
EMI1_SEL_EN
Always enabled. Controls EMI1 signal access to PEX sideband connectors.
• 0 - Disconnected
• 1 - Connected
5
—
Reserved
6
—
Reserved
7
SPI_I
2
C_SEL
Controls selection of 1588 riser card interface: SPI or I
2
C4 bus interface.
• 0 - I
2
C4
• 1 - SPI