Phytec phyCORE-PXA270, Руководство по оборудованию

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Memory Configuration
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PHYTEC Meßtechnik GmbH 2006 L-668e_1
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Control register 4 controls the external supply voltage for MultiMedia
Card #1 of the phyCORE-PXA270.
REG ADDR D7-D4 D3 D2 D1 D0
CTRL 4 0x04000008 Res Res Res Res MMC1PWR
RW
R/W=0 R/W=0 R/W=0 R/W=0 R/W
Signal
Name /MMC1_3V
Table 12: PLD U7 Control Register 4
MMC1PWR Setting this bit turns on the supply voltage for
MMC card #1.
Control register 5 is reserved for MultiMedia Card #2. Here the supply
voltage can be switched on and the access LED can be activated. The
register bits WP and DET return the card status.
REG ADDR D7-D4 D3 D2 D1 D0
CTRL 5 0x0400000A Res WP DET LED MMC2PWR
RW R/W=0 R R R/W R/W
Signal
Name MMC_WP2 MMC_DET2 xMMC_LED /MMC2_3V
Table 13: PLD U7 Control Register 5
MMC2PWR Setting this bit turns on the supply voltage for the
MMC card 2.
LED Setting this bit turns on the access indication LED
for then MMC card on the Expansion Board.
DET If an MMC card is inserted in the socket then
reading this bit returns "0", otherwise it is "1".
WP If a MMC card is inserted in the socket that is write
protected then reading this bit returns a "0",
otherwise it is set to "1".