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Control registers

IC Bit pin Control Desc
U801 Q1 4 FAST 1 = Fast integration on ADC
U801 Q2 5 LST_PH 1 = Normal ADC operation
U801 Q3 6 FREQ_EN 1 = Normal ADC operation
U801 Q4 7 I3, FREQ_LOAD 1 = Normal ADC operation
U801 Q5 14 I4 1 = Set ADC conversion rate (LSB)
U801 Q6 13 I5 1 = Set ADC conversion rate
U801 Q7 12 I6 1 = Set ADC conversion rate
U801 Q8 11 I7 1 = Set ADC conversion rate
U800 Q1 4 I8 1 = Set ADC conversion rate
U800 Q2 5 I9 1 = Set ADC conversion rate
U800 Q3 6 I10 1 = Set ADC conversion rate
U800 Q4 7 I11 1 = Set ADC conversion rate
U800 Q5 14 I12 1 = Set ADC conversion rate
U800 Q6 13 I13 1 = Set ADC conversion rate (MSB)
U800 Q7 12 OHMCA 1 = Select Ohms Cal on U325 (LSB)
U800 Q8 11 OHMCB 1 = Select Ohms Cal on U325 (MSB)
U300 Q1 4 BUF, /BUF 1 = Q306 on and Q304 off.
U300 Q2 5 VLO2, BSCOM 0 = -8VF to VLO2, 1 = -8VF to BSCOM.
U300 Q3 6 /REF 0 = 7V ref to A/D Buffer (via U317).
U300 Q4 7 //1 0 = Input Buffer to A/D Buffer (Q308 and Q313 on).
U300 Q5 14 /CAL 0 = Cal Divider to A/D Buffer (via U319).
U300 Q6 13 //2 0 = -0.5 or 1.5 gain (via U319).
U300 Q7 12 /ZERO 0 = Zero to A/D Buffer (via U319).
U300 Q8 11 FE ZERO, ONE SHOT 1 = Q527 and Q539 on, 0 = ONE SHOT (via U334) for PRECHARGE (Q538 on).
U303 Q1 4 /X1 0 = x1 A/D Buffer; U318 (/X1) closed.
U303 Q2 5 /X5 0 = x5 A/D Buffer; U318 (/X5) closed.
U303 Q3 6 /X50 0 = x50 A/D Buffer; U318 (/X50) closed.
U303 Q4 7 /2VREF 0 = 1.75V ref to A/D Buffer (via U318).
U303 Q5 14 /AC 0 = ACV/A to A/D Buffer (via U320).
U303 Q6 13 /DCA 0 = DCA to A/D Buffer (via U320).
U303 Q7 12 nc x
U303 Q8 11 nc x

Updated by tin over 8 years ago ยท 2 revisions