Vicom Systems FC-FC3 Manual de usuario descargar pdf (Pagina 47)

CONFIDENTIAL [AK8999A/AW/AD]

MS1600-E-00 2014/05

- 47 -

5.2) Control Register (Volatile Memory) Map

Name Content

Address

(hex)

Data

D7 D6 D5 D4 D3 D2 D1 D0

CM1

Adjustment mode 00h

AM[3] AM[2] AM[1] AM[0]

0 0 0 0

CM2

OSC variable ratio

Note1)

01h

CT[7] CT[6] CT[5] CT[4] CT[3] CT[2] CT[1] CT[0]

0 0 0 0 0 0 0 0

Reserved

02h –

1Fh

Note) Lower line of each data represents the control register data upon power-up.

Access to the reserved addresses is prohibited.

Write “0” to the unused D[7:0].

Note1) Access to this register serves as ReadOnly.

6) EEPROM and control register Description

6.1) Description of EEPROM

Offset and span adjustment should be made after measurement mode setup and adjustment of the

reference generator including VREF, IREF, OSC and VTMP.

a) Offset voltage adjustment (EEPROM names: OCR, OCF)

Coarse adjustment should be performed first, followed by a fine adjustment for the offset voltage.

The content of the adjustment EEPROMs are shown here.

a.1) Offset voltage coarse adjustment (OCR)

The offset voltage is adjusted coarsely.

The offset adjustment voltage varies ratiometrically with respect to the supply voltage.

The ratio in the table below is benchmarked to a VOUT output of 4800 mV (@VDD: 5V) as 100%

(Ratio = (Offset voltage @VDD: 5V)/4800[mV]*100[%]).

Address : 00 hex D[3:0] = EOCR[3:0]

EOCR [2:0] Ratio VDD:3V, 3.3V VDD:5V

Description

Dec Hex Bin (%)

EOCR

[3] = 0

(mV)

EOCR

[3] = 1

(mV)

EOCR

[3] = 0

(mV)

EOCR

[3] = 1

(mV)

0 0 000 0.00 0 0 0 0 Default

1 1 001 33.33 800 -800 1600 -1600

2 2 010 66.67 1600 -1600 3200 -3200

3 3 011 100.00 2400 -2400 4800 -4800

4 4 100 133.33 3200 -3200 6400 -6400

5 5 101 166.67 4000 -4000 8000 -8000

6 6 110 200.00 4800 -4800 9600 -9600

7 7 111 233.33 5600 -5600 11200 -11200

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 67 68

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Vicom Systems FC-FC3 Manual de usuario Pagina 47

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