User's Manual

Table Of Contents
ACGPass e-ID Desktop Reader, Ver. Dual ISO 2.3
8.4.3.13.2 Write port
If user port is used as an output, a 1kΩ resistor has to be integrated into the wire.
Otherwise the reader device can be damaged.
Port state Description
00h Sets USER port to low
01h Sets USER port to high
02h – 7Fh RFU
80h - FFh Sends a serial data frame and checks the received frame
Figure 8-26: Write User port settings
Sending a Data Frame
If the highest bit (MSB) is set in the State of the User Port, the command sends a
serial data frame out the USER port.
The frame includes a start bit, 8 data bits, parity bit and a stop bit.
Transmit
Frame
Description
Low Start bit
Low RFU
Data Bit 6 State of the User Port Bit 6
Data Bit 5 State of the User Port Bit 5
Data Bit 4 State of the User Port Bit 4
Data Bit 3 State of the User Port Bit 3
Data Bit 2 State of the User Port Bit 2
Data Bit 1 State of the User Port Bit 1
Data Bit 0 State of the User Port Bit 0
Parity Bit Even Parity Bit
High Stop Bit
Figure 8-27: Sending Serial Data Frame
After 2ms Guard Time the answer should be received on the User Port otherwise an
error is returned.
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