AS8510-ASSP datasheet(38/47 Pages) AMSCO

38 / 47 page

www.ams.com/AS8510

Revision 3.5

37 - 46

AS8510

Datasheet - Detailed Descr i p ti on

Note:

All the registers from address 0x19 to 0x2C are read-only.

7.9.1 Standby Mode - Power Consumption

In Standby Mode 1 there is a timer based accurate measurement every Ta seconds. The device itself stays in idle-mode as long as it does not

get a different command from the SPI interface. Internal oscillator frequency is typically foscint=262 kHz to reduce power consumption as long as

the timer runs. After every time out of Ta secs, it performs accurate measurement of current, voltage/ temperature. Data ready is signaled to

microcontroller through an interrupt signal on INT and goes into STOP state.

In the SBM the following equations hold:



Tsbm1 = Ta= 10s (default value is 10secs); the power consumption is valid for this setting. This is the period of the repetition rate in SBM 1

and SBM2.



sett ≈ 2ms (depending on external capacitors). This is the time required by the analog part to settle when the new measuring period is

started. Any measurements performed during T

sett produce invalid results.



T1 = 3ms (by default setting, every third measurement is sent to microcontroller in the SBM mode 1) is the time needed to perform the first

measurement.



meas =Tsett +T1 is the total active time needed to get a valid result.



DRSBM = T

meas/Tsbm ≈ 5ms/10s. This is the ratio of repetition time versus the active time (Device in NOM mode).

Power consumption = (DRSBM*NOM mode power consumption) + ((10s-5ms)/10s)*Stop mode power consumption)

DEC_REG_R2_V

0000_0100

R/W

D[7:5]

Reserved

D[4]

Interrupt Mask Control for Voltage channel data Ready

Interrupt on INT pin (Default is 0)

0Unmasked

1Masked

D[3:2]

These two bits select the source of output 16-bit data in

Normal mode from Voltage channel. Default is 01

FIR / MA Output

CIC2 Output

Dechop/Demod Output

CIC Output

D[1:0]

Reserved

FIR CTL_REG_V

0000_0000

R/W

D[7]

This bit selects FIR / MA Filter in Voltage channel.

Default is 0 (FIR)

0FIR

1MA Filter

D[6:3]

These bits select the number of data samples for

averaging in MA filter in Voltage channel.

Default is 0000 (bypass)

0000

bypass

0001

0011

0111

1111

D[2:0]

Reserved

Table 33. Control Registers

Addr in

HEX

POR Value

R/W

8-bit Control / Status Data

AS8510-ASSP Arkusz danych(PDF) 38 Page - ams AG

AS8510-ASSP Arkusz danych(HTML) 38 Page - ams AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47

Arkusz danych Pobierz

Link URL