单稳态模式下的 SG2 会生成具有定义的延音时间间隔的单个脉冲。请参阅节 3.2。要再次启动脉冲，用户必须按原样执行整个脚本。该模式大多需要延音计时器配置。

单稳态模式下没有重启时间配置。表 3-4 中介绍了适用于此模式的其他 ADSR 参数。

Key: w a0 XX YY ==> write to I2C address 0xa0, to register 0xXX, data 0xYY 
# # ==> comment delimiter 
#
#The following list gives an example sequence of items that must be #executed in the time between powering the device up and reading data #from the device. Note that there are other valid sequences depending #on which features are used.
#See the corresponding EVM user guide for jumper settings and audio #connections.
#
# Line-Out Fully-Differential 2-channel : OUT1P_M- Ch1, OUT2P_M- Ch2. 
# FSYNC = 48 kHz (Output Data Sample Rate), BCLK = 12.288 MHz (BCLK/FSYNC = 256) ################################################################### 
#one shot mode	
#repeat script to generate pulse again 

w a0 01 01	# device reset
	
w a0 00 00	# locate page 0x00
w a0 02 09	# come out of sleep mode 
                # with VREF and DREG up	
	
w a0 00 01	# locate page 0x01
w a0 2d 04	# enable the chirp only
	
w a0 00 17	# locate page 0x17
w a0 7c 02 18 2a 47	# chirp start frequency, 1khz
	
w a0 00 18	#locate page 0x18
w a0 08 00 35 9d d3	# chirp delta frequency of 100 Hz
	
w a0 08 00 00 00 00	# chirp delta frequency is set to zero
	
w a0 00 1c	#locate page 0x1c
w a0 40 ff ff ff ff # adsr_note; write this code to generate a chirp 
                    #and initiate the signal again with 0x01,	
                    #the signal will last based on the sustain timer set 

#restart	
w a0 50 ff ff ff ff  # restart_timer	
	
#sustain	
#w a0 54 00 00 5d c0	#24000 samples at 500ms
w a0 54 00 00 12 c0 # 480 samples 100ms default	
	
	
w a0 00 17	# locate page 0x17
w a0 74 FF FF FF FF # power up delay continued	
	
w a0 00 11 # locate page 0x11	
w a0 70 3F FF 3F FF	# Please refer the table to set volumes #accordingly
w a0 74 0F FF 0F FF	# Please refer the table to set volumes        #accordingly
	
w a0 00 00	# locate page 0x00
w a0 76 0c	# enable 2 DAC channels
w a0 78 40	# enable DAC
w a0 40 00 00 00 01	#adsr enable note. 

图 4-6 SG2 单稳态模式示波器捕获：2Vrms 满量程时的 1KHz 信号