Silex technology Embedded Intelligent Module SX-560 Dokumentacja Pobierz pdf (Strona 20)

The mode of operation for each of the GPIOs can be set by installing jumpers between headers JP7 and

JP8 for GPIO operation, or between headers JP8 and JP9 for special function operation (all of the special

functions are enabled by default). For example, in the follow diagram, GPIO_3 is enabled for SPI

temperature sensor, while GPIO_4 is enabled as the DTR signal (DTR0) for Serial Port 1. The GPIO_5

through GPIO_8 are used as normal GPIOs in this example.

Figure 9 GPIO Special Functions Jumpers (Example Configuration)

The GPIOs are accessed via header JP3 as described in the next section. You can set and read the

GPIO state, and set SNMP traps based on the GPIO state as described in Chapter 6 of this manual.

26-Pin I/O Header

The I/O Header, located at JP3, is a 26-pin interface for connecting to the SX-560 GPIO and SPI

interfaces. It also provides a direct way of connecting to the SX-560 console interface using 3.3V logic

levels rather than the DB-9 RS-232 connector.

The GPIOs, located on JP3, can be used for controlling or monitoring OEM functions. External pull-ups

are recommended for customization.

Table 9 26-Pin I/O Header

Signal

Selectable

Signal

Selectable

GPIO_1

GPIO_0

GPIO_2

3.3V

GND

HGPIO_3

Via JP7

HGPIO_5

Via JP7

HGPIO_4

Via JP7

HGPIO_7

Via JP7

HGPIO_6

Via JP7

GPIO_9

HGPIO_8

Via JP7

3.3V

GPIO_10

SPI CLK

GND

SPI SLVCS-

SPI MOSI

TXD2

SPI MISO

GND

RXD2

GPIO 3

GPIO 4

GPIO 5

GPIP 6

GPIO 7

GPIO 8

TSPICS

DTR0

DSR0

DCD0

GRN

YEL

JP7

JP8

JP9

NOTE: GPIO_10 is fixed as a switch input (Test Button) and GPIO_9 is fixed as an LED output (power on/off).

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 103 104

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