ACR122L – Communication Protocol
Version 1.03
www.acs.com.hk
Page 36 of 57
Where:
Byte 3
Link to Buzzer. Controls the buzzer state during the LED Blinking.
00h: The buzzer will not turn on.
01h: The buzzer will turn on during the T1 Duration.
02h: The buzzer will turn on during the T2 Duration.
03h: The buzzer will turn on during the T1 and T2 Duration.
Data Out
SW1 SW2. Status Code returned by the reader.
Status Code
Results
SW1
SW2
Meaning
Success
90
Current LED State The operation is completed successfully.
Error
63
00h
The operation is failed.
Current LED State (1 Byte)
Status
Item
Description
Bit 0
Current LED_1 LED
1 = On; 0 = Off
Bit 1
Current LED_0 LED
1 = On; 0 = Off
Bits 2 – 7
Reserved
Notes:
1. The LED State operation will be performed after the LED Blinking operation is completed.
2. The LED will not change if the corresponding LED Mask is not enabled.
3. The LED will not blink if the corresponding LED Blinking Mask is not enabled. Also, the
number of repetition must be greater than zero.
4. T1 and T2 duration parameters are used for controlling the duty cycle of LED blinking and
Buzzer Turn-On duration.
5. For example, if T1=1 and T2=1, the duty cycle = 50%. Duty Cycle = T1 / (T1 + T2).
6. To control the buzzer only, set the P2 “LED State Control” to zero.
7. The make the buzzer operate, the “number of repetition” must greater than zero.
8. To control the LED only, set the parameter “Link to Buzzer” to zero.
