Phytec phyCORE-OMAP44 Series, Руководство по оборудованию

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Part II: PCM-959/phyCORE-OMAP44xx Carrier Board phyCORE-OMAP44xx
130 ©
PHYTEC Messtechnik GmbH
2012
L-760e_1
2.1.3.13 User programmable GPIOs
Figure 38: GPIOs at Expansion Connector X5
In general most of the pins of the phyCORE-OMAP44xx which are connected directly to the OMAP44xx can be
configured to act as GPIOs, due to the function multiplexin at most controller pins. Thereby, it must be
considered that most of the signals are used on the phyCORE-OMAP44xx Carrier Board already. This also applies
to the three dedicated GPIOs of the phyCORE-OMAP44xx. Special functions have been assigned to these GPIOs
in order to demonstrate their use (see also
Table 42 ). Signals not used extend from the phyCORE-Connector
(X22) directly to the expansion connector X5. The following table lists all signals available as GPIOs.
In order to use the GPIOs the software must be changed.
SPI1 Chip Select Signal Connector / Interface SL
SPI1_CS0_3V3 PEB1 Interface (X19) 3.3 V
SPI1_CS1_3V3 PEB2 Interface (X18) 3.3 V
SPI1_CS2_3V3 Display Interface (X12) 3.3 V
SPI1_CS3_3V3 Expansion Connector (X5) 3.3 V
Table 61: Assignment of the SPI1 Chip Select Signals