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X9530 Datasheet(PDF) 6 Page - Intersil Corporation |
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X9530 Datasheet(HTML) 6 Page - Intersil Corporation |
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6 / 30 page  6 FN8211.0 March 10, 2005 I2DS: CURRENT GENERATOR 2 DIRECTION SELECT BIT (NON-VOLATILE) The I2DS bit sets the polarity of Current Generator 2, DAC2. When this bit is set to “0” (default), the Current Generator 2 of the X9530 is configured as a Current Source. Current Generator 2 is configured as a Current Sink when the I2DS bit is set to “1”. See Figure 5. Control Register 1 This register is accessed by performing a Read or Write operation to address 81h of memory. This byte’s volatility is determined by bit NV1234 in Control register 0. L1DA5 - L1DA0: LUT1 DIRECT ACCESS BITS When bit L1DAS (bit 4 in Control register 5) is set to “1”, LUT1 is addressed by these six bits, and it is not addressed by the output of the on-chip A/D converter. When bit L1DAS is set to “0”, these six bits are ignored by the X9530. See Figure 7. A value between 00h (0010) and 3Fh (6310) may be written to these register bits, to select the corresponding row in LUT1. The written value is added to the base address of LUT1 (90h). Control Register 2 This register is accessed by performing a read or write operation to address 82h of memory. This byte’s volatility is determined by bit NV1234 in Control register 0. L2DA5 - L2DA0: LUT2 DIRECT ACCESS BITS When bit L2DAS (bit 6 in Control register 5) is set to “1”, LUT2 is addressed by these six bits, and it is not addressed by the output of the on-chip A/D converter. When bit L2DAS is set to “0”, these six bits are ignored by the X9530. See Figure 7. A value between 00h (0010) and 3Fh (6310) may be written to these register bits, to select the corresponding row in LUT2. The written value is added to the base address of LUT2 (D0h). Control Register 3 This register is accessed by performing a Read or Write operation to address 83h of memory. This byte’s volatility is determined by bit NV1234 in Control register 0. D1DA7 - D1DA0: D/A 1 DIRECT ACCESS BITS When bit D1DAS (bit 5 in Control register 5) is set to “1”, the input to the D/A converter 1 is the content of bits D1DA7 - D1DA0, and it is not a row of LUT1. When bit D1DAS is set to “0” (default) these eight bits are ignored by the X9530. See Figure 6. Control Register 4 This register is accessed by performing a Read or Write operation to address 84h of memory. This byte’s volatility is determined by bit NV1234 in Control register 0. D2DA7 - D2DA0: D/A 2 DIRECT ACCESS BITS When bit D2DAS (bit 7 in Control register 5) is set to “1”, the input to the D/A converter 2 is the content of bits D2DA7 - D2DA0, and it is not a row of LUT2. When bit D2DAS is set to “0” (default) these eight bits are ignored by the X9530. (See Figure 6). Control Register 5 This register is accessed by performing a Read or Write operation to address 85h of memory. I1FSO1 - I1FSO0: CURRENT GENERATOR 1 FULL SCALE OUTPUT SET BITS (NON-VOLATILE) These two bits are used to set the full scale output current at the Current Generator 1 pin, I1. If both bits are set to “0” (default), an external resistor connected between pin R1 and Vss, determines the full scale output current available at pin I1. The other three options are indicated in the table below. The direction of this current is set by bit I1DS in Control register 0. See Figure 5. *No external resistor should be connected in these cases between R1 and VSS. I1FSO1 I1FSO0 I1 Full Scale Output Current 0 0 Set externally via pin R1 (Default) 01 ±0.4mA* 10 ±0.85 mA* 11 ±1.3 mA* X9530 |
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