TDC-GP21 datasheet(30/91 Pages) AMSCO

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TDC-GP21

acam messelectronic gmbh - Friedrich-List-Str.4 - 76297 Stutensee - Germany - www.acam.de

3-5

START_CLKHS[1:0] Defines the time interval the chip waits after

switching on the oscillator before making a

measurement.

Note:

The highest bit to adjust START_CLKS is

located in register 6, bit 20. This has to be

set to 1 for settling times of 2.44 ms and

5.14 ms.

0 = Oscillator off

1 = Oscillator continuously on

2 = settling time 480 µs

3 = settling time 1.46 ms

4 = settling time 2.44 ms

5 to 7 = settling time 5.14 ms

ANZ_PORT

(PORT#)

Sets number of ports used for temperature

measurement

0 = 2 temperature ports (PT1 and PT2)

1 = 4 temperature ports

TCYCLE

Sets cycle time for temperature

measurement

0 = 128 µs cycle time @ 4 MHz

1 = 512 µs cycle time @ 4 MHz

(recommended)

ANZ_FAKE

(FAKE#)

Number of dummy cycles at the beginning of

a temperature measurement

0 = 2 Fake measurements

1 = 7 Fake measurements

SEL_ECLK_TMP

(SelClkT)

Select reference signal for internal cycle

clock for temperature measurement

0 = use 32.768 kHz as cycle clock

1 = use 128 * CLKHS as period for cycle

clock (32 µs with 4 MHz high speed clock

signal )

CALIBRATE

Enables/disables calibration calculation in the

ALU

0 = calculation of calibrated results off

(allowed only in measurement mode 1)

1 = calculation of calibrated results on

(recommended)

NO_CAL_AUTO

(DisAutoCal)

Enables/disables auto-calibration run in the

TDC

0 = auto-calibration after measurement

1 = auto-calibration disabled

MESSB2

(MRange2)

Switch to measurement mode 2

0 = measurement mode 1

1 = measurement mode 2

NEG_STOP2

Negation stop 2 input

0 = non-inverted input signal – rising edge

1 = inverted input signal – falling edge

NEG_STOP1

Negation stop 1 input

0 = non-inverted input signal – rising edge

1 = inverted input signal – falling edge

NEG_START

Negation start input

0 = non-inverted input signal – rising edge

1 = inverted input signal – falling edge

ID0

Free bits, e.g. to be used as identification or

version number

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