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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The reset properties for SRES on the Carrier Board are set in control
register 0.
REG ADDR D7-D4 D3 D2 D1 D0
CTRL0 0x04000000 Res Res GPIO0 RESOUT SRES
RW R/W=0 R/W=0 R/W R/W R/W
Signal
Name GPIO_0 /RESET_OUT /RES_X
/RESIN
Table 8: PLD U7 Control Register 0
SRES Setting this bit generates a system reset.
RESOUT This bit is not used on the PXA270 controller.
GPIO0 This bit is not used on the PXA270 controller.
PLD U7 control register 1 is used for switching and controlling
various supply voltages. The bit PM_5V displays whether the 5 V
voltage is still active or if it was shut off due to a wall adapter output
voltage drop to less than 8 V. If 5V_OFF is set, the 5 V supply can be
shut off independently of the input voltage level. The external CAN
supply voltage can be switched on with the CANPWR bit.
REG ADDR D7-D4 D3 D2 D1 D0
CTRL1 0x04000002 Res PM_5V CANPWR Res Res
RW
R/W=0 R R/W R/W=0 R/W=0
Signal
Name PM_5V CAN_VE
Table 9: PLD U7 Control Register 1
CANPWR Turns on the external CAN supply voltage (bit set).
PM_5V Indicates that 5 V supply voltage is active.
The registers for controlling the Carrier Board's user LEDs D11, D12
and D15 are in U7 control register 2. The register values are negated
by the PLD so that the LEDs can be switched with a high-active level.
The LEDs are located on the Carrier Board between the phyCORE
module and the backlight inverter board (
refer to Figure 2 ).