HID Hi-O iCLASS Installation Guide - Manual (Page 19)

iCLASS OEM75 Integration Guide, 3141-907, Rev. B.0
January 2014 Page 19 of 49
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Table 5-2: P1 Connector I/O Functionality
Connection Pin #` Signal Name Function
P1 1 +3.3 VDC 0.1W max Power sourced output
P1 2 Ground Logic level reference
P1 3 SPI Clock / (I2C SCLK) Clock signal for either SPI or I2C
P1 4 /SPI Chip Select Active Low signal to select the SPI
chip
P1 5 SPI Data In (I2C_SDA) SPI Data Line valid when clock signal
transitions.
P1 6 SPI Data Out SPI Data Line valid when clock signal
transitions
P1 7 UART Receive Serial Input Line
P1 8 UART Transmit Serial Output Line
Table 5-3: P2 Connector I/O Functionality
Connection Pin #` Signal Name I/O Function
P2 1 Supply Voltage
Positive (V+)
Input Power Supply Positive Voltage
P2 2 Supply Voltage
Negative (V-)
Input Power Supply Ground
P2 3 /Reset Input Active Low signal which resets the OEM
75.
P2 4 /Hold Input Active Low signal which holds off
presentation of card data. When
asserted, this line either buffers a card or
disables a card read until released, as
configured.
P2 5 /Green LED and
Card Present
Output The signal on this pin, reflects the
recognition of a card in the vicinity of the
antenna.
P2 6 Wiegand Data 0 Output Internal 1K to +3.3VDC & Collector
P2 7 Wiegand Data 1 Output Internal 1K to +3.3VDC & Collector
P2 8 /Beeper Output Active Low signal which enables off
board signaling
P2 9 /Red LED Output Active Low signal which can be used to
enable an off board Red LED
Table 5-4: P3 Connector I/O Functionality
Connection Pin #` Pin Name
P3 1 Antenna
P3 2 Antenna Feedback
P3 3 Ground 1
P3 4 Ground 2