phyCARD-M [PCA-A-M1-xxx]
104
©
PHYTEC Messtechnik GmbH 2010 L-750e_1
17.3.11
SPI Connectivity
The SPI interface of the X-Arc bus is available at the expansion
connectors X8A and X9A as well as at the display data connector X6
(refer to
sections 17.3.7.1
and
17.3.13
to see the Pin-out). Due to the
X-Arc bus specification only two slave select signals are available.
Because of that the CPLD maps the SPI interface to two of the
connectors depending on the configuration of switches 7 and 8 of DIP-
Switch S3. The table below shows the possible configurations.
Button Setting Description
S3_7/
S3_8
0/0
0/1
1/x
SS0/GPIO0
12
-> expansion 0 (X8A),
SS1/GPIO1
1
-> expansion 1 (X9A)
SS0/GPIO0
1
-> expansion 0 (X8A),
SS1/GPIO1
1
-> display data connector (X6)
SS0/GPIO0
1
-> expansion 1 (X9A),
SS1/GPIO1
1
-> display data connector (X6)
Table 44:
SPI connector selection
17.3.12
User programmable GPIOs
Two (GPIO0_IRQ and GPIO1_IRQ) of the three GPIO / Interrupt
signals available at the X-Arc bus are freely available. They are
mapped to the expansion connectors X8A and X9A (pin 16), or to the
display data connector X6 (pin 5) depending in the configuration at
DIP-Switch S3 (see
Table 44
). The third GPIO / Interrupt signal
(GPIO2_IRQ) is used to connect the interrupt output of the touch
screen controller at U28 to the phyCARD-M.
12
: GPIO0
≙
GPIO1_1 (at L16) and GPIO1
≙
GPIO2_23 (at V3) of the i.MX35
Содержание phyCARD-M
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Страница 32: ...phyCARD M PCA A M1 xxx Figure 7 Jumper locations bottom view 24 PHYTEC Messtechnik GmbH 2010 L 750e_1 ...
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