AS8515 datasheet(35/65 Pages) AMSCO

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AS8515

Datasheet - AS8515 Bottom Die Overvi ew

Figure 24. Bottom Die Device Initialization Sequence at Soft-reset

8.8.2 Soft-reset of the Measurement Path Using Bit D[7] of Reset Register 0x09

Measurement path also can be reset by using D[6] bit of Reset Register at 0x09. On applying soft-reset only signal measurement path registers

will be reset. For applying this reset, device should be in STOP state. If the device is working with external clock, at the time of soft-reset the

clock needs to be disabled.

8.8.3

Reconfiguring Gain Setting of PGA

Only PGA gain settings can be changed dynamically while ADC conversions are in progress. When PGA gain settings are changed, the first

sample from the ADC is invalid. Ignore the first interrupt after the gain re-configuration. Valid data starts from the second interrupt onwards.

Figure 25. Bottom Die - Re-configuration of Gain Setting of PGA

8.8.4 Configuring the Device During Normal Mode

Following registers can be programmed dynamically when the device is in operational mode (Normal mode).



ACH_CTL_REG address is 0x17 for channel selection on the voltage measurement path



PGA_CTL_REG address is 0x13 for gain setting



PD_CTL_REG2 address is 0x15 for PGA Bypass



ISC_CTL_REG address is 0x18 for current source programmability

During the operation (Normal mode) of the device, if any of the registers need to be programmed or changed other than the above mentioned

registers, then it is required to STOP the device by writing into MOD_CTL_REG “STOP” bit and configure the device as per the requirements and

start the device.

DATA-N

DATA-N+1

TDATA_STATUS_RD

TDATA_VALID

TDATA_INVALID

Re-Configure

Device

Start

ADC

INT

CHOP_CLK

Channel Data

0x0000

DATA1

DATA2

500µS

1.5mS

TDATA_STATUS_RD

TDATA_VALID

TDATA_INVALID

Soft Reset

UsingD7

DATA-N

DATA-N+1

TDATA_STATUS_RD

TDATA_VALID

TDATA_INVALID

INT

CHOP_CLK

Channel Data

DATA1

DATA2

TDATA_STATUS_RD

TDATA_VALID

TDATA_INVALID

TDATA_STATUS_RD

GainRe-Configurationcan be

carriedout inthis slot, skipnext

interrupt andChannel Data.

ReadChannel

data in this slot

VALID

DATA

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