14
Low/High Level Reference Register (10 & 12) Two 12 bit Digital to Analog Converters (DAC)
are used to create the low and high level references to the output logic. These registers are write
only. See Figure 10 for details.
10 Low Level Reference Registers
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Write Not Used Reference Voltage
Read 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Ref. Voltage
2 Ohm Output Imp: 000h = -10.0 V, 800h = 0.0 V, FFFh = 10.0 V, bit resolution = 4.884 mV
50 Ohm Output Imp: 000h = -5.0 V, 800h = 0.0 V, FFFh = +5.0 V, bit resolution = 2.442 mV
12 High Level Reference Registers
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Write Not Used Reference Voltage
Read 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Ref. Voltage
2 Ohm Output Imp: 000h = -10.0 V, 800h = 0.0 V, FFFh = 10.0 V, bit resolution = 4.884 mV
50 Ohm Output Imp: 000h = -5.0 V, 800h = 0.0 V, FFFh = +5.0 V, bit resolution = 2.442 mV
NOTE: The Low Level R eference shou ld not be programmed more positi ve than th e High Level
Reference. Likewise, the High Level Reference should not be program med less
negative than the Low Level Reference.
Figure 10. Low/High Level Reference Registers