Phytec phyCORE-OMAP44 Series, Руководство по оборудованию

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phyCORE-OMAP44xx Part I: PCM-049/phyCORE-OMAP44xx System on Module
L-760e_1 © PHYTEC Messtechnik GmbH 2012 17
1.2 Pin Description
Please note that all module connections are not to exceed their expressed maximum voltage or current.
Maximum signal input values are indicated in the corresponding controller manuals/data sheets. As damage
from improper connections varies according to use and application, it is the user's responsibility to take appro-
priate safety measures to ensure that the module connections are protected from overloading through
connected peripherals.
All controller signals extend to surface mount technology (SMT) connectors (0.5 mm) lining two sides of the
module (referred to as the phyCORE-Connector). This allows the phyCORE-OMAP44xx to be plugged into any
target application like a "big chip".
The numbering scheme for the phyCORE-Connector is based on a two dimensional matrix in which column
positions are identified by a letter and row position by a number. Pin 1A, for example, is always located in the
upper left hand corner of the matrix. The pin numbering values increase moving down on the board.
Lettering of the pin connector rows progresses alphabetically from left to right (refer to
Figure 4 ).
The numbered matrix can be aligned with the phyCORE-OMAP44xx (viewed from above; phyCORE-Connector
pointing down) or with the socket of the corresponding phyCORE Carrier Board/user target circuitry. The upper
left-hand corner of the numbered matrix (pin 1A) is thus covered with the corner of the phyCORE-OMAP44xx
marked with a triangle. The numbering scheme is always in relation to the PCB as viewed from above, even if all
connector contacts extend to the bottom of the module.
The numbering scheme is thus consistent for both the module’s phyCORE-Connector as well as the mating
connector on the phyCORE-OMAP44xx Carrier Board or target hardware, thereby considerably reducing the risk
of pin identification errors.
Since the pins are exactly defined according to the numbered matrix previously described, the phyCORE-
Connector is usually assigned a single designator for its position (X1 for example). In this manner the phyCORE-
Connector comprises a single, logical unit regardless of the fact that it could consist of more than one physical
socketed connector.
The following figure illustrates the numbered matrix system. It shows a phyCORE-OMAP44xx with SMT phyCORE-
Connectors on its underside (defined as gray lines) mounted on a carrier board. In order to facilitate under-
standing of the pin assignment scheme, the diagram presents a cross-view of the phyCORE-module showing
these phyCORE-Connectors mounted on the underside of the module’s PCB.
Table 2 provides an overview of the Pin-out of the phyCORE-Connector with signal names and descriptions
specific to the phyCORE-OMAP44xx. It also provides the appropriate signal level interface voltages listed in the
SL (Signal Level) column and the signal direction.
Caution:
Most of the controller pins have multiple multiplexed functions. Because most of these pins are connected
directly to the phyCORE-Connector the functions are also available there. Signal names and descriptions in
Table 2 , however, are in regard to the specification of the phyCORE-OMAP44xx and the functions defined
therein. Please refer to the OMAP44xx Reference Manual, or the schematic to to get to know about alternative
functions. In order to utilize a specific pin's alternative function the corresponding registers must be config-
ured within the appropriate driver of the BSP. To support all features of the phyCORE-OMAP44xx Carrier Board
a few changes have been made in the BSP delivered with the module.
Table 42 lists all pins with functions
different to what is described in Table 2 .