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Programmable Hardware Manual (PHM)
© Tibbo Technology Inc.
The EM2000 can work with binary keypads incorporating up to 8 data lines.
For more information see I/O (io.) and keypad (kp.) objects. They are documented
in the "Programmable Hardware Manual".
4.1.1.13
Power, Reset, PLL Control, and Mode Selection
Power
The EM2000 should be powered from a stabilized DC power supply with the nominal
output voltage of 3.3V (+/- 5% tolerance). This power should be applied to the pin
#60. "-A" modification of the EM2000 has the second VCC pin -- #72. To prevent
"current loops", use either pin (but not both pins) to supply the power to the
device.
The current consumption of the EM2000 is approximately 100mA (PLL on, 100BaseT
mode). This does not include the power consumption of the wireless add-on module,
such as the
. This Wi-Fi add-on significantly contributes to the power
consumed by the EM2000. Therefore, providing an adequate power supply is very
important — a poorly built circuit may affect EM2000 operation. We recommend that
you use a switching power supply.
For correct device operation, the VCCB line should not be left unconnected. You
may connect this line to the backup battery, or main 3.3V power (see
).