Reference (Module W*)68C3 Operations Manual North Atlantic Industries, Inc. 12/19/2014Rev: 2014-12-19-0947 www.naii.com Page 295 of 330Reference VoltageType: 16-bit unsigned integerRange: 2.0 to 115.0 VRMSRead/Write: R/WInitialized Value: N/AProgram Reference Voltage, where LSB is 0.01 VRMS. For example: To program 26.1 VRMS, 26.1 x 100= 2610,which equals 0xA32. In this example, 0x0000 would be programmed in the Reference Voltage High register, and0x0xA32 would be programmed in the Reference Voltage Low register. To program 115 VRMS, 115 x 100= 11,500which equals 0x2CEC. In this example, 0x0000 would be programmed in the Reference Voltage High register,and 0x2CEC would be programmed in the Reference Voltage Low register. Note: Reference Voltage High registeralways remains at 0x0000.REGISTER D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 FUNCTION0081.9240.9620.4810.245.122.561.280.640.320.160.080.040.020.01approximate valueREF VOLTAGE LO D D D D D D D D D D D D D D D D D=DATA BIT (V)REGISTER D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 FUNCTION0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 approximate valueREF VOLTAGE HI D D D D D D D D D D D D D D D D D=DATA BIT (V)Reference Module Power EnableType: 16-bit unsigned integerRange: 0,1Read/Write: R/WInitialized Value: 0The Reference Module Power Enable register is utilized for Reference module output/power control. Set the bit toenable the power output stage of the Reference module. “1” = Enable; “0” = Disabled. Initialized default is “0”.D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0D/S Module Power Enable X X X X X X X X X X X X X X X DReference Overcurrent1Type: 16-bit unsigned integerRange: 0,1Read/Write: R/WInitialized Value: 0The Reference Overcurrent register is utilized for status and re-set of the reference module overcurrent protectioncircuit. In normal operation, this register will be defaulted to “0”. This is a status indication that the referencemodule is NOT in overcurrent condition. If the channel senses an over current condition, the module willautomatically shut down and re-enable the output approximately every 1.3 seconds for a total of 10 seconds. Afterapproximately 10 seconds, if the overcurrent condition has persisted, the output stage will be shut-down and theReference Overcurrent register will be set to “1”. To re-enable the output stage and re-engage the automatic 10second overcurrent protection circuit, write a “0” to the Reference Overcurrent register.D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0D/S Module Power Enable X X X X X X X X X X X X X X X DNote1: Reference Overcurrent feature added for DOM 8/2010 and later.
