HID Global Corporation SE3210 사용자 설명서
iCLASS SE Reader Module Hardware Developer Guide, SE3200-902, Rev B.0
October 2012
Page 13 of 42
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2.4
Peripheral Circuits
The following section details recommended peripheral circuitry.
2.4.1 External Pull-up Resistors
External pull-up resistors may be required on the UART Tx and MOSI lines to prevent floating
I/O anomalies.
2.4.2 External Noise Filter
If false card detections occur in Ultra Low Power mode, or the host has spectral noise, a line
filter designed to block frequencies in the 10 KHz to 50 KHz range is beneficial when inline
with the power line.
2.4.3 Adding External LEDs and Beeper
The Cathodes are connected through an external resistor to the RED or GREEN LED
connector port signals. The OEM supplies current limiting resistors for modules.
The value of these resistors depends on how much current is provided for the LEDs.
The value of these resistors depends on how much current is provided for the LEDs.
Consider the combined voltage drop of the resistor and OEM75 output low voltage on these
signal lines when selecting the LED brightness.
2.5
Transitioning from the OEM50, OEM75 and eProxL Modules
Provided are suggestions for transitioning from the HID OEM50 and eProx Lock modules to
the OEM75.
2.5.1 OEM50
If you are transitioning from an OEM50 – here are the differences.
•
The OEM50 connector is a 2 X 6 0.1" space pin header or PWB hole pattern.
•
The OEM50 has a two-wire interface to the antenna and the iCLASS SE
Reader has a 2-wire interface for NPM and a 5-wire interface for ULPM
applications. Therefore, it is possible that the OEM50 antenna will work with
the SIO Processor Board in NPM.
•
The harness and signal changes to adapt the signals from the OEM50 2 X 6
pattern to an OEM75 1 x 9 1.25mm pattern are the following.
Note: The additional P2 for HSI and SPI interfaces are 1 x 8 1.25mm pattern.
OEM50
SE32XX
P2 Connector
Pin 1
Exc Supply
No signal on the SE32XX
Pin 2
Exc Return is not used
No signal on the SE32XX
Pin 3
Serial Transmit
Same as P301 pin 8 - UART Transmit
Pin 4
Serial Receive
Same as P301 pin 7 - UART Receive
Pin 5
Vdd Return
Same as P701 pin 2 - Battery Minus
Pin 6
Vdd +5VDC
Same as P701 pin 1 - Battery Positive
and 5VDC is a good supply voltage
and 5VDC is a good supply voltage