Phytec phyCORE-PXA255, Руководство по оборудованию

Страница: 40 / 106

Development Board for phyCORE-PXA255
32 
PHYTEC Meßtechnik GmbH 2004 L-657e_0
P C M C I A - C o n t r o l
U 6
2 , 5 "
I D E
C o n n e c t
A 0 - 2 5
D 0 - 1 5
C o n t r o l
X D 0 - 1 5
X A 0 - 1 0
C o n t r o l
5 V P o w e r
F l a s h 3 2 - b i t
D 0 - D 1 5
V C C _ C O R E
U 1 0
D 0 - D 1 5
U 1 3
S D R A M
B a n k 0
D 1 6 - D 3 1
U 1 5
S D R A M
B a n k 0
F l a s h 3 2 - b i t
D 1 6 - D 3 1
U 1 2
U 5
P X A 2 5 5
X 1
M M C - C a r d
3 2 k H z
U 2 0
R T C
U 2
E G P I O
U 1 9
C A N
U 3
U S B
Figure 15: IDE Circuitry
The PCMCIA interface settings are made in the PXA255 controller.
The IDE register of the PLD U7 along with their reset values are
given in the following table.
REG ADDR D7 D3 D2 D1 D0
IDE 0 0x2001000 Res Res PM_5V RES RES
Reset X
IDE 1 0x2001002 Res DMA0/1 DMAEN RES IDE/MEM
Reset 0 0 0
IDE 2 0x2001004 Res RDY Res /IDE_RES Res
Reset 0 0
IDE 3 0x2001006 Res Res IDEIN IDEON IDEOE
Reset 0 0 0
IDE 4 0x2001008 Res IDE5V RES 5V/3V IDEPWR
Reset x 1 0
Table 18: IDE Control Register with Reset Values
The operating states of the 5 V supply voltage can be read in the IDE
control register 0. If the Development Board’s input voltage drops
below 8 V, the 5 V supply voltage will be shut off.
REG ADDR D7 D3 D2 D1 D0
IDE 0 0x2001000 Res Res PM_5V RES RES
RW R/W=0 R/W=0 R R/W=0 R/W=0
Table 19: IDE Control Register 0
PM_5V Reading a "1" from this input indicates that the 5 V
supply voltage des System und des LCD aktiv