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db12348e_V3.11_preliminary_2017-07-06

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AS89010

V3.11

Figure 7: SYNS Mode timing11

idle or

standby

idle or

standby

conversion

data

fetch

conversion

SYN

OUT0..OUT3

STATE

I²C

activity

data

fetch

READY

TINT

5.1.4 Synchronous Measurement Start and Stop Mode (SYND Mode)

The start and the stop of the measurement are completely controlled by the SYN signal. When the device

is in the idle or Standby state the first coming falling edge starts the measurement. Each following falling

edge of SYN, which occurs within the conversion, can stop or continue the measurement. The content of

EDGES register determines which edge is the stopping one. This means that the measurement will not stop

until a certain number of falling edges passed within the conversion time. This certain number of edges is

represented by a value of register EDGES (see Figure 8 and Figure 9). For further details see also Figure

22.

Figure 8: SYND Mode timing, register EDGES = 1

idle or

standby

idle or

standby

conversion

data

fetch

conversion

SYN

OUT0..OUT3

STATE

I²C

activity

data

fetch

READY

TINT

start edge

stop edge

0

1

0

1

Figure 9: SYND Mode timing, register EDGES > 1

conversion

idle or

standby

data

fetch

conversion

SYN

OUT0..OUT3

STATE

I²C

activity

READY

TINT

start edge

stop edge

0

1

EDGES-1

EDGES

0

1

Data fetch should be performed between the rising edge of READY signal and the next falling edge of SYN

in order to allow distortion free measurement.

11 Dash lines indicate variable conditions