Reference Manual ADuCM356
REGISTER DETAILS: LOW POWER TIA/POTENTIOSTAT AND DAC CIRCUITS
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Table 118. Bit Descriptions for LPDACCON1 (Continued)
Bits Bit Name Settings Description Reset Access
5 DACMDE Low-Power DAC1 Switch Settings. Control bit for the low-power DAC1 output switches. 0x0 R/W
0 Low-Power DAC1 switches set for normal mode.
1 Low-Power DAC1 switches set for diagnostic mode.
4 VZEROMUX VZERO1 Output. Select which low-power DAC1 output connects to the VZERO1 node. Ensure same
value is written to the VBIASMUX bit. If this bit is set to 1, LPDACCON1, Bit 3 = 1. If this bit is cleared to
0, LPDACCON1, Bit 3 = 0.
0x0 R/W
0 VZERO1 6-bit. Default. Clear to 0 for VZERO1 output to be 6-bit.
1 VZERO1 12-bit. Set to 1 for VZERO1 output to be 12-bit.
3 VBIASMUX Bit Select. Select which low-power DAC1 output connects to the VBIAS1 node. Ensure same value is
written to the VZEROMUX bit. If this bit is set to 1, LPDACCON1, Bit 4 = 1. If this bit is cleared to 0,
LPDACCON1, Bit 4 = 0.
0x0 R/W
0 12-bit output. Default. 12-bit DAC connects to the VBIAS1 pin.
1 6-bit output. 6-bit DAC connects to the VBIAS1 pin.
2 REFSEL Low-Power DAC1 Reference Select. 0x0 R/W
0 Select 2.5 V from low-power buffer as DAC reference. Default.
1 Select AVDD power supply as DAC reference.
1 PWDEN Low-Power DAC1 Power. Power-down control bit for low-power DAC1. 0x1 R/W
0 Low-Power DAC1 powered on. Clear to 0 to power on low-power DAC1.
1 Low-Power DAC1 powered off. Default. Power down low-power DAC1 and open all switches on the
low-power DAC1 output.
0 RSTEN Enable Writes to LPDACDAT1. 0x0 R/W
0 Disable low-power DAC1 writes. Default. If cleared to 0, LPDACDAT1 is always 0. Writes to
LPDACDAT1 are disabled.
1 Enable low-power DAC1 writes.
LOW-POWER REFERENCE CONTROL REGISTER
Address: 0x400C2050, Reset: 0x00000000, Name: LPREFBUFCON
Table 119. Bit Descriptions for LPREFBUFCON
Bits Bit Name Settings Description Reset Access
[31:3] Reserved Reserved. 0x0 R
2 BOOSTCURRENT Set this Bit when Using both Channel 0 and Channel 1 Potentiostat Channels. 0x0 R/W
0 Option to clear to 0 when using only one potentiostat channel to support only one low-power
DAC and save power.
1 Set to 1 to boost bias current of low-power reference buffer to support driving two low-power
DACs.
1 LPBUF2P6DIS Low-Power Band Gap Output Buffer. Normally cleared to enable the low-power reference buffer. 0x0 R/W
0 Enable low-power 2.5 V buffer.
1 Power down low-power 2.5 V buffer.
0 LPREFDIS Low-Power Band Gap Power-Down Bit. Normally cleared to enable the low-power reference. 0x0 R/W
0 Low-power reference enabled.
1 Low-power reference powered down.
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