151 Programmable Hardware Manual (PHM)
© Tibbo Technology Inc.
When the US jumper is closed, debug serial port is used.
Reset button
Pressing this button causes an "external" reset.
Ethernet Status LEDs
Further information on Ethernet status LEDs can be found in Status LEDs.
External LED Control
The NB1010 is intended to be used with the LB1000 board. This board provides:
·
Green and red LED pair.
·
Green and yellow LED pair.
·
LED bar comprising five yellow LEDs.
Green and red LED pair -- system status indication
Further information on status LEDs can be found in Status LEDs.
Green and yellow LED pair -- Ethernet status indication
Further information on Ethernet status LEDs can be found in Status LEDs.
LED bar -- wireless signal strength indication
Five yellow LEDs of the LED bar are intended primarily for the indication of the RF
signal strength (i.e. when the Wi-Fi and/or GPRS options are installed). These LEDs
are controlled through three GPIO lines 46, 47, and 48.
GPIO46 is the reset line of the LED bar. Clearing this line sets all five outputs to
LOW and this turns all LEDs ON. GPIO47 is a clock line- a positive (LOW-to-HIGH)
transition on this line "shifts in" the data on the GPIO48 line. The circuit that
controls the LEDs is shown below. LED numbers correspond to numbers shown on
the LB100x drawing.
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